Here's a concise summary of US Patent 12256676:

Title: Baling apparatus and method

Assignee: Twin Pak LLC

Inventor: Michael Jason Grady

Filing Date: July 6, 2023

Issue Date: March 25, 2025

Abstract: The patent describes a baling apparatus and method that uses one or more splitting knives within a baling chamber to simultaneously divide crop material picked up from a field. The divided bales are then discharged from the baling chamber and received by an ejection chute structure. This chute ejects the bales in a spaced relationship to each other as the apparatus moves across the field. The spacing can be longitudinal (staggered ejection times) and/or lateral (by turning the bales using angled surfaces in the chute).

Independent Claim Overview:

Claim 1: This independent claim describes a baling apparatus designed to create multiple square bales simultaneously. It includes:

• A baling chamber with an inlet for crop material and an open exit end. The chamber has a roof and a horizontally extending floor, both made with spaced members.
• A plunger that moves within the baling chamber, pushing crop material from the inlet towards the exit.
• A stationary splitting knife fixed vertically to the floor of the baling chamber. This knife has a leading cutting edge positioned across the path of the crop material, facing the plunger. It also features opposing vertical cutting edges that taper towards the leading edge, creating tapered areas on either side. These features help to centrally split the compressed crop material into bales on opposite sides of the knife, without the knife itself moving. The top of the splitting knife is mounted at the same level as the baling chamber's roof, and its bottom extends through a gap in the floor's spaced members.

Uncertainty Note: A search of CAFC 2026 dockets for US patent 12256676 did not return any specific cases related to this patent number as of April 26, 2026. Therefore, there is no authoritative information regarding any legal challenges or proceedings at the CAFC for this patent at this time.

As of April 26, 2026, there is no known litigation specifically involving US patent 12256676. A search of CAFC dockets for this patent number did not return any specific cases. To definitively search for federal court records, including potential patent litigation, a registered PACER account is required, as PACER provides electronic public access to federal court records and allows searching a nationwide index of federal cases. Without such access, a comprehensive search across all federal district courts is not feasible.

Therefore, based on the current available information without PACER access, no litigation is known for US patent 12256676.

Proceedings overview

The USPTO ODP API currently returns no AIA trial proceedings for US Patent 12256676. A comprehensive web search also indicates no Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) proceedings have been filed against this patent as of 2026-08-04. Therefore, all claims (specifically claim 1, which is the only claim in the patent) remain untested by PTAB proceedings. This provides no immediate defensive leverage for a defendant based on PTAB invalidity findings, meaning the patent is unhardened but also not weakened by such challenges.

Strategic summary

As of the current date, US Patent 12256676 has not been subjected to any AIA trial proceedings (IPR, PGR, or CBM).

• Claims Status: The sole claim of US12256676, Claim 1, remains UNTESTED by any PTAB challenge. It has not been cancelled, sustained, or modified through these proceedings.
• Estoppel Landscape: Since no PTAB proceedings have occurred, there is no estoppel under 35 U.S.C. § 315(e)(2) for any potential petitioner or its privies. All prior-art grounds (e.g., under § 102 or § 103) are theoretically still available for an IPR or PGR petition, assuming statutory and regulatory requirements are met (e.g., timing, standing).
• Pattern Signals: The absence of PTAB activity suggests no immediate defensive aggregator involvement or serial challenges against this specific patent. This could be due to its relatively recent issue date (March 25, 2025), or it may not have been aggressively asserted in a manner that would trigger defensive PTAB filings.

Recommended next steps

Given the lack of PTAB activity for US12256676, the recommended next steps are as follows:

1. Monitor for future filings: Continuously monitor the USPTO PTAB E2E system and public dockets for any newly filed IPR, PGR, or CBM petitions, as these could be initiated at any time, especially if the patent owner begins assertion campaigns.
2. Evaluate for potential PTAB challenge: If facing assertion of US12256676, conduct a thorough prior art search and invalidity analysis to determine if strong grounds exist for an IPR or PGR petition against Claim 1. Consider the statutory deadlines for filing (e.g., PGR within 9 months of grant, IPR after 9 months or termination of PGR, and within 1 year of service of an infringement complaint).
3. Absence as a signal: While the absence of PTAB challenges could imply a lack of compelling prior art or strategic value, it is more often due to the patent being relatively new or not yet asserted in a widespread manner. Do not assume validity solely based on the lack of PTAB proceedings.

As of today, no PTAB activity exists for US Patent 12256676.

Inventors

• Michael Jason Grady: Employer at time of filing is not explicitly stated in the patent document. Based on the Google Patents record, the application was "filed by Individual" (Michael Jason Grady) and he was the "Original Assignee" before a subsequent assignment.

Original assignee

The entity named on the issued patent (US12256676B2) is initially Michael Jason Grady, as an individual inventor and original assignee. Subsequently, it was assigned to Twin Pak LLC.

Twin Pak LLC:

• Product Embodiment: The patent describes a "Baling apparatus and method" for forming multiple bales of crop material simultaneously. Whether Twin Pak LLC ships a product directly embodying these claims is not explicitly stated in the patent text or the available search results. Without further information, this remains unclear.
• Primary Line of Business: The patent is related to agricultural machinery, specifically baling. It can be inferred that Twin Pak LLC's primary business would be in this sector, but specific details are not provided.
• Current Status: Based on the USPTO assignment record, Twin Pak LLC is the current assignee. Its operational status (operating, acquired, dissolved, in bankruptcy) is not specified in the patent information.

Assignment timeline

• 2025-06-06 (executed) / recorded 2025-06-26 — Reel 071538/0133
  • Conveyance: Assignment
  • Assignor: GRADY, MICHAEL JASON, MR.
  • Assignee: TWIN PAK LLC, NEW MEXICO
  • Correspondent: MICHAEL GRADY, 715 NORTHERN MEADOWS DR, LAS CRUCES, NM 88007
  • Context: Transfer from individual inventor to an LLC.

Timeline diagram

timeline
    title Ownership of US 122566676
    2023 : Filed by Michael Jason Grady
    2025 : Issued
    2025 : Assigned to TWIN PAK LLC

NPE / troll-pattern signals

1. Shell-entity transfer — Unclear. The initial transfer is from an individual inventor to Twin Pak LLC. While the name "Twin Pak LLC" doesn't inherently suggest a shell entity, there is insufficient information in the patent record or search results to determine if it's a licensing-only entity, has no products in commerce, or uses a registered-agent address.
2. Known asserter in the chain — Not present. Neither Michael Jason Grady nor Twin Pak LLC appear on common public NPE lists (Acacia Research Corp, Marathon Patent Group, Intellectual Ventures, RPX, Unified Patents, etc.).
3. Repeat correspondent across the chain — Not present. There is only one recorded assignment for this patent in the USPTO Assignment Center, handled by MICHAEL GRADY. Thus, no recurrence of a correspondent can be observed for this specific patent.
4. Cascading transfers — Not present. There is only one recorded assignment, not multiple consecutive transfers.
5. Pre-litigation transfer — Not present. As of August 4, 2026, there is no known litigation involving this patent. The assignment occurred in June 2025.
6. Bankruptcy fire-sale — Not present. There is no indication in the patent record or search results of the assignor (Michael Jason Grady) or the assignee (Twin Pak LLC) undergoing bankruptcy proceedings leading to this assignment.
7. Privateering — Unclear. Without further information on Twin Pak LLC's business model and any potential agreements with Michael Jason Grady or other operating companies, it is not possible to determine if this is a privateering arrangement.
8. Defensive aggregator (anti-NPE) — Not present. The chain does not terminate at a known defensive aggregator like RPX, AST, LOT Network, Unified Patents, or Open Invention Network.

Verdict

Insufficient data.
The single recorded assignment from the individual inventor, Michael Jason Grady, to Twin Pak LLC does not provide enough evidence to confidently classify this as an NPE assertion, operating company assertion, or defensive action. There are no clear signals of shell entities, known asserters, repeat correspondents, or a history of litigation to draw a firm conclusion.

Verification search: https://assignmentcenter.uspto.gov/

To identify the most relevant prior art for US patent 12256676, I will use the Google Patents record for US12256676B2, which lists "Prior art keywords" and "Citations". I will then supplement this with a direct search on the USPTO Patent Public Search (PPUBS) to ensure comprehensive coverage, although the Google Patents data is often quite complete for citations.

Based on the Google Patents record for US12256676B2, the following are the cited prior art documents:

Citations by Examiner (or those marked with an asterisk)

1. US2067083A

   • Full Citation: US2067083A - Bale cutting machine
   • Publication Date: 1937-01-05
   • Priority Date: 1932-08-16
   • Brief Description: This patent describes a bale cutting machine, which focuses on cutting existing bales. While it involves cutting bales, its primary function is post-baling division rather than simultaneously forming multiple bales during the initial baling process as described in US12256676.
   • Potential Anticipation (Claim 1): This patent potentially anticipates the broad concept of "dividing crop material" but not the specific apparatus of US12256676's Claim 1, which involves a stationary splitting knife within a baling chamber to simultaneously form multiple square bales during the baling process. The described machine cuts already formed bales.

2. US2105215A

   • Full Citation: US2105215A - Rubber shear
   • Publication Date: 1938-01-11
   • Priority Date: 1935-10-01
   • Brief Description: This patent describes a rubber shear, which is a cutting device for rubber. It is a general cutting mechanism.
   • Potential Anticipation (Claim 1): This patent is very unlikely to anticipate any specific element of Claim 1, as it is in a completely different technical field (rubber processing vs. hay baling) and describes a general shearing mechanism, not a baling apparatus.

3. US2671267A

   • Full Citation: US2671267A - Air-cooled blade for cutting plastic covers and the like from patterns
   • Publication Date: 1954-03-09
   • Priority Date: 1951-09-15
   • Brief Description: This patent describes an air-cooled blade for cutting plastic materials from patterns.
   • Potential Anticipation (Claim 1): Similar to US2105215A, this patent is in a different technical field (plastic cutting) and describes a specialized blade, not a baling apparatus or its specific components as claimed in US12256676.

4. US2706238A

   • Full Citation: US2706238A - Electrically heated knife
   • Publication Date: 1955-04-12
   • Priority Date: 1952-01-31
   • Brief Description: This patent describes an electrically heated knife.
   • Potential Anticipation (Claim 1): This patent describes a general cutting tool with a heating element and is not relevant to the specific baling apparatus and splitting knife claimed in US12256676.

5. US3099203A

   • Full Citation: US3099203A - Baling machines
   • Publication Date: 1963-07-30
   • Priority Date: 1961-06-07
   • Brief Description: This patent describes a baling machine that produces bales in pairs or sections using a stationary blade and a movable second blade mounted on a plunger. The blades have tapered cutting edges for a shearing action. This patent is explicitly discussed in the "Brief Discussion of the Related Art" section of US12256676. The description notes disadvantages of Klemm et al.'s design, specifically the complex blade arrangement needed to prevent intermingling of fibers.
   • Potential Anticipation (Claim 1): This patent is highly relevant. It anticipates the concept of producing multiple bales using a splitting mechanism within a baling chamber, including a stationary blade and a plunger. However, Claim 1 of US12256676 differentiates itself by specifically detailing a stationary splitting knife with a leading cutting edge and opposing vertical cutting edges tapering to said leading cutting edge to assist center splitting without requiring movement of the splitting knife itself, and the structure of the roof and floor with spaced members. US3099203A uses both stationary and movable blades. Therefore, it likely anticipates many elements of Claim 1 but may not fully anticipate the specific knife geometry and the "without requiring movement of said splitting knife" aspect in conjunction with the precise cutting edge description.

6. US5742010A

   • Full Citation: US5742010A - Hay baler scale
   • Publication Date: 1998-04-21
   • Priority Date: 1996-08-28
   • Brief Description: This patent describes a hay baler scale for weighing bales.
   • Potential Anticipation (Claim 1): This patent is focused on weighing mechanisms for bales, not on the formation or splitting of bales within the baling chamber itself. Therefore, it is unlikely to anticipate any elements of Claim 1.

7. US5829238A

   • Full Citation: US5829238A - Bale accumulator
   • Publication Date: 1998-11-03
   • Priority Date: 1996-08-08
   • Brief Description: This patent describes a bale accumulator for gathering and arranging bales after they are formed.
   • Potential Anticipation (Claim 1): This patent relates to post-baling handling of bales, not the internal mechanism of the baling chamber for forming and splitting bales. Therefore, it is unlikely to anticipate any elements of Claim 1.

8. US6339986B1

   • Full Citation: US6339986B1 - Apparatus for processing large square hay bales into smaller recompressed bales
   • Publication Date: 2002-01-22
   • Priority Date: 1997-11-03
   • Brief Description: This patent describes an apparatus for recompressing large square hay bales into smaller bales. This involves processing already formed large bales.
   • Potential Anticipation (Claim 1): Similar to US2067083A, this patent deals with processing already formed bales, not simultaneously forming multiple bales during the initial baling operation with an internal splitting knife as described in Claim 1 of US12256676.

9. US20090235628A1

   • Full Citation: US20090235628A1 - Baling systems and methods
   • Publication Date: 2009-09-24
   • Priority Date: 2008-03-24
   • Brief Description: This patent application describes baling systems and methods.
   • Potential Anticipation (Claim 1): Without reviewing the full text, it is difficult to precisely assess anticipation. However, given its more recent publication date compared to US3099203A and its general title, it might describe aspects of baling, but whether it specifically teaches the unique stationary splitting knife features of Claim 1 of US12256676 is unclear without a deeper dive. The patent US7895944B2, which has the same priority date and assignee, is a granted version of this application and is also cited.

10. US7895944B2

    • Full Citation: US7895944B2 - Baling systems and methods
    • Publication Date: 2011-03-01
    • Priority Date: 2008-03-24
    • Brief Description: This patent describes baling systems and methods. It appears to be the granted patent corresponding to US20090235628A1.
    • Potential Anticipation (Claim 1): Similar to US20090235628A1, a full review is needed. However, the claims of US12256676 are quite specific regarding the stationary splitting knife and its geometry and interaction with the plunger to simultaneously form multiple bales. It is possible this patent addresses some elements of baling but not the exact combination and specific features of the splitting knife.

11. US10869428B2

    • Full Citation: US10869428B2 - Baling apparatus and method
    • Publication Date: 2020-12-22
    • Priority Date: 2018-07-02
    • Brief Description: This patent is a direct continuation of US Patent Application Ser. No. 16/025,751, filed on Jul. 2, 2018, which is itself a direct predecessor to US12256676. The current patent explicitly claims priority from this patent (US10869428B2). Therefore, it is part of the same patent family and describes very similar, if not identical, subject matter.
    • Potential Anticipation (Claim 1): This patent is a parent application and describes substantially the same invention. It would not be considered "prior art" in the sense of anticipating its own child application, but rather demonstrates the continuous development and claiming strategy. It is not an anticipatory reference for invalidity purposes under 35 U.S.C. § 102 but is crucial for understanding the patent family and prosecution history.

Summary of Most Relevant Prior Art for Anticipation under 35 U.S.C. § 102

The most relevant prior art for potentially anticipating Claim 1 of US12256676 under 35 U.S.C. § 102 is US3099203A (Klemm et al.). This patent describes a baling machine that uses blades within the baling chamber to produce multiple bale sections. While it does not perfectly match the specific geometry and "without requiring movement of said splitting knife" aspect of Claim 1, it addresses the core concept of dividing crop material within a baling chamber to form multiple bales. The other patents either deal with cutting pre-formed bales, general cutting tools, or post-baling handling, making them less directly anticipatory of the specific apparatus claimed in Claim 1. US10869428B2 is a parent patent and not prior art in the anticipatory sense.

Obviousness Analysis of US Patent 12256676 under 35 U.S.C. § 103

This analysis assesses the obviousness of Claim 1 of US Patent 12256676, titled "Baling apparatus and method," by considering combinations of prior art references. The standard for obviousness under 35 U.S.C. § 103 requires determining whether the differences between the claimed invention and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art (PHOSITA). This involves identifying a motivation to combine references, a reasonable expectation of success, and an articulation of the obviousness rationale.

Primary Reference: US3099203A to Klemm et al. ("Klemm")

Klemm describes a baling machine designed to produce bales in pairs or sections using a stationary blade and a movable second blade mounted on a plunger. The blades have tapered cutting edges that exert a shearing action. The specification of US12256676 explicitly identifies Klemm as relevant prior art in its "Brief Discussion of the Related Art," noting that Klemm's design has "the disadvantage of requiring a complex blade arrangement in an attempt to prevent intermingling of fibers of the sections as the sections are discharged from the baling chamber."

Klemm teaches many elements of Claim 1 of US12256676:

• A baling apparatus for forming multiple bales simultaneously.
• A baling chamber with an inlet and an exit end.
• A plunger movable within the baling chamber to compress crop material.
• A splitting mechanism within the baling chamber, including a stationary blade, for forming multiple bales.
• The use of tapered cutting edges.

Distinguishing Features of Claim 1 over Klemm

Despite the similarities, Claim 1 of US12256676 includes several distinguishing features when compared to Klemm:

1. Solely Stationary Splitting Knife for Splitting: Claim 1 specifies a "stationary splitting knife... to assist center splitting of the crop material to simultaneously form bales... without requiring movement of said splitting knife." Klemm, in contrast, utilizes both a stationary blade and a movable blade mounted on the plunger to achieve a shearing action.
2. Specific Stationary Knife Geometry: Claim 1 details the knife geometry: "a leading cutting edge extending vertically from said floor to be transverse to said path and to face said plunger and opposing vertical cutting edges tapering to said leading cutting edge, said opposing vertical cutting edges being angled toward said leading cutting edge and said leading cutting edge being centered between said opposing vertical cutting edges to form tapering areas on opposite sides of said leading cutting edge to assist center splitting." While Klemm mentions tapered cutting edges, it does not explicitly describe this precise stationary, wedge-like geometry designed for center splitting through plunger force alone.
3. Spaced Members in Roof/Floor and Knife Mounting: Claim 1 specifies that the "roof and said floor are formed with spaced members" and that the "bottom portion of said splitting knife extends through a gap between spaced members of said floor." It also notes the "top portion of said splitting knife is mounted to a support at the same level as said roof of said baling chamber." Klemm does not explicitly detail the construction of the baling chamber's roof and floor with spaced members or the precise mounting of the stationary blade through such gaps.

Motivation to Combine and Obviousness Rationale

A person having ordinary skill in the art (PHOSITA) at the time of the invention would have been motivated to combine the teachings of Klemm (US3099203A) with general knowledge in the field of baler design and mechanical splitting, thereby rendering Claim 1 obvious.

Motivation for Modifying Klemm's Splitting Mechanism:

The specification of US12256676 itself provides a clear motivation for modifying Klemm's design: "The combination of stationary and movable blades [in Klemm] has the disadvantage of requiring a complex blade arrangement in an attempt to prevent intermingling of fibers of the sections as the sections are discharged from the baling chamber."

A PHOSITA, recognizing this identified disadvantage of complexity and potential fiber intermingling in Klemm's design, would be motivated to simplify the splitting mechanism and achieve a cleaner, more efficient split.

1. Simplifying to a Solely Stationary Knife: It would be obvious to a PHOSITA to simplify Klemm's "complex blade arrangement" by eliminating the movable blade from the plunger and relying solely on a robust, stationary splitting knife. This would reduce the number of moving parts, decrease mechanical complexity, and potentially lower manufacturing and maintenance costs. The concept of splitting material by pushing it against a fixed blade is a fundamental mechanical principle.
2. Designing an Effective Stationary Splitting Knife: To achieve effective splitting with a solely stationary knife, a PHOSITA would consider common knife geometries known to "assist center splitting." The described geometry in Claim 1—a leading cutting edge transverse to the path, with opposing vertical cutting edges tapering towards it to form tapering areas—is a well-known, straightforward, and effective wedge-like design for splitting material when force is applied against it. Such designs are prevalent in various cutting and splitting applications (e.g., wood splitting, or even general bale cutting machines like US2067083A, which shows a knife for cutting bales, though post-formation). A PHOSITA would readily understand how to adapt such a known splitting profile to a stationary knife within a baling chamber, where the plunger provides the necessary compressive force.
3. Integrating the Knife with Baler Chamber Structure: The detailed mounting of the stationary splitting knife to the floor and roof, specifically through "gaps between spaced members," is a matter of routine engineering and conventional baler design. The patent itself states that baling chamber walls, including the floor and roof, "are formed of spaced members to reduce weight and provide gaps to accommodate needles and twine of knot tying means... and to allow the walls to be adjusted to control compression of bales in the baling chamber." Given that such spaced members and gaps are common and serve functional purposes in balers, it would be obvious for a PHOSITA to utilize or adapt these structural features for securely mounting any internal stationary component, such as a splitting knife. Attaching a vertical element securely from both its bottom (floor) and top (roof) for stability is standard mechanical design practice.

Therefore, a PHOSITA, motivated to address the complexity and potential fiber intermingling issues of Klemm's dual-blade system, would have found it obvious to replace Klemm's combined stationary/movable blade setup with a single, robustly mounted, stationary splitting knife featuring a commonly known wedge-like geometry, integrated into a baler chamber utilizing conventional spaced members and gaps for mounting.

Conclusion

Based on the foregoing, Claim 1 of US12256676 would have been obvious to a PHOSITA in light of US3099203A (Klemm et al.) in combination with general knowledge of mechanical splitting techniques and conventional baler structural design. The motivation to simplify Klemm's "complex blade arrangement" and improve splitting efficiency would have led a PHOSITA to employ a singular, stationary, wedge-shaped splitting knife, and to integrate it into the baler's structure using routine engineering principles.

Patent Term Adjustments (PTA) and Patent Term Extensions (PTE)

As of the current date (April 26, 2026), the Google Patents record for US12256676B2 does not explicitly state any Patent Term Adjustment (PTA) or Patent Term Extension (PTE) applied to the patent.

• Patent Term Adjustment (PTA): PTA is granted to compensate for delays caused by the USPTO during the prosecution of a patent application. These delays can include failing to issue a first office action within 14 months, failing to respond to an applicant's reply within 4 months, or failing to issue the patent within 4 months after the issue fee is paid. Without access to the full prosecution history of US12256676, the specific PTA, if any, cannot be definitively determined.
• Patent Term Extension (PTE): PTE is available for patents covering products, such as pharmaceuticals, food additives, color additives, and medical devices, that require regulatory approval from agencies like the FDA before they can be commercially marketed. This patent, concerning a baling apparatus and method for agricultural crop material, does not appear to fall into a category of products typically eligible for PTE, as it is not subject to FDA or similar regulatory review.

Therefore, it is highly unlikely that US12256676 has received any Patent Term Extension.

Continuation and Divisional Applications

The Google Patents record for US12256676B2 shows the following related applications:

• Priority Applications:
  • US18/218,984 (This is the application number for US12256676B2 itself)
  • US19/088,661 (Filed 2025-03-24, Title: "Baling Apparatus and Method")
• Applications Claiming Priority:
  • US16/025,751 (Filed 2018-07-02, Granted as US10869428B2)
  • US17/127,112 (Filed 2020-12-18, Published as US20210169011A1)
  • US18/218,984 (This is the application for US12256676B2 itself, filed 2023-07-06)

Based on this, the following relationships can be identified:

• Continuations:
  • US12256676B2 is a continuation of U.S. patent application Ser. No. 17/127,112, filed Dec. 8, 2020.
  • U.S. patent application Ser. No. 17/127,112 is a continuation of U.S. patent application Ser. No. 16/025,751, filed Jul. 2, 2018 (now U.S. Pat. No. 10,869,428).
  • US19/088,661 (Published as US20250318474A1) is a continuation of US12256676B2.
• Divisional Applications: There is no explicit mention or identification of divisional applications in the provided Google Patents data for US12256676B2. A divisional application contains subject matter from a parent application and typically arises when a parent application lacks unity of invention.
• Related Family Members (beyond direct continuations/divisionals):
  • US10869428B2: "Baling apparatus and method," granted from US16/025,751, which is a parent of the line leading to US12256676B2.
  • US20210169011A1: "Baling Apparatus and Method," published from US17/127,112, which is a direct parent of US12256676B2.
  • US20240016096A1: This is listed as another version of US12256676B2, published on 2024-01-18.
  • US12219902B2 (from application US18/218,994): This is listed in the "Family Applications" section, sharing the same priority date of 2018-07-02.

Projected Expiration Date

The statutory term for a U.S. utility patent (other than a design patent) is generally 20 years from the filing date of the earliest non-provisional application for which a benefit is claimed.

For US12256676B2, the earliest priority date is 2018-07-02 (from U.S. patent application Ser. No. 16/025,751).

Therefore, the base expiration date (20 years from the earliest priority date) is:
2018-07-02 + 20 years = 2038-07-02.

This date is corroborated by the "Anticipated expiration" date listed on the Google Patents page for US12256676B2. Any Patent Term Adjustment (PTA) would extend this date, but as noted, the specific PTA calculation is not readily available without accessing the USPTO's Private PAIR system or a more detailed patent record.

The USPTO search results primarily provide general information about how to search for patents and access various patent-related resources. They confirm the existence of the "Patent Public Search" (PPUBS) tool for searching U.S. patents and published applications. However, they do not directly return the specific patent document for 12256676. As the full patent text was provided in the prompt and stated as authoritative, I will proceed with generating the defensive disclosure based on that provided text, particularly Claim 1.

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Defensive Disclosure for US Patent 12256676

Patent Title: Baling apparatus and method
Patent Number: US12256676B2
Inventor: Michael Jason Grady
Assignee: Twin Pak LLC
Issue Date: March 25, 2025

This document serves as a defensive disclosure to expand the publicly available prior art related to baling apparatus and methods, particularly those involving the simultaneous formation and splitting of crop material into multiple bales. The intent is to render future incremental improvements by competitors obvious or non-novel by publicly disclosing a wide range of derivative variations of the core inventive concept embodied in Claim 1 of US12256676B2.

Core Claim Focus: Claim 1

Claim 1 describes a baling apparatus for simultaneously forming multiple square bales of crop material using a stationary splitting knife within a baling chamber. Key elements include the baling chamber with spaced members in the roof and floor, a movable plunger, and a stationary splitting knife with a specific leading and tapering cutting edge geometry, mounted through gaps in the spaced members of the floor.

Derivative Variations

1. Material & Component Substitution

Derivative 1.1: Ceramic Matrix Composite Splitting Knife with Electric Linear Actuator Plunger

Enabling Description:
A baling apparatus where the stationary splitting knife (64) is fabricated from a ceramic matrix composite (CMC), specifically silicon carbide (SiC) fibers in a SiC matrix, reinforced for enhanced wear resistance and reduced friction coefficient compared to traditional hardened steel. The knife's leading and tapering cutting edges are coated with a diamond-like carbon (DLC) film via plasma-enhanced chemical vapor deposition (PECVD) to minimize material adherence and further reduce wear during high-volume splitting operations. The hydraulic plunger (62) is replaced with a high-force, high-speed electric linear actuator system comprising a ball screw mechanism driven by a three-phase permanent magnet synchronous motor (PMSM) with closed-loop feedback control (e.g., using a rotary encoder and current/position sensors). The baling chamber's spaced members (40, 46) are constructed from high-strength aluminum alloys (e.g., 7075-T6) with integrated polymer (e.g., Ultra-High Molecular Weight Polyethylene - UHMW-PE) wear plates in contact areas to reduce friction and noise. The knife's bottom portion extends through a UHMW-PE bushing within the floor's spaced members.

graph TD
    A[Crop Material] --> B(Pickup Unit)
    B --> C{Baling Chamber}
    C --> D[CMC Splitting Knife with DLC Coating]
    C --> E[Electric Linear Actuator Plunger]
    E -- Compresses --> D
    D -- Splits Material --> F(First Bale)
    D -- Splits Material --> G(Second Bale)
    F --> H[Ejection Chute Structure]
    G --> H
    H -- Ejects --> I[Spaced Bales on Field]
    C -- Structural Support --> J[Alloy Frame with UHMW-PE Wear Plates]
    J -- Mounting --> D
    E -- Drive --> K(PMSM & Ball Screw)
    K -- Control --> L(Closed-Loop Controller)

Derivative 1.2: Modular, Interchangeable Tungsten Carbide Splitting Knife System

Enabling Description:
A baling apparatus featuring a stationary splitting knife (64) constructed from sintered tungsten carbide (WC) segments, mechanically affixed to a high-strength steel spine. These WC segments are designed to be modular and individually replaceable to facilitate maintenance and accommodate different splitting profiles (e.g., wider taper for softer materials, sharper angle for denser materials). The attachment mechanism utilizes a dovetail or T-slot joint with high-tensile fasteners, allowing for rapid field replacement without specialized tools. The plunger (62) remains hydraulically actuated but incorporates a ceramic-coated piston rod to resist abrasion from crop material fragments. The baling chamber's floor (40) and roof (46) spaced members are re-engineered using high-strength steel box sections, interconnected with quick-release pin assemblies to allow for rapid access to the baling chamber and knife system.

graph TD
    A[Crop Material] --> B(Pickup Unit)
    B --> C{Baling Chamber}
    C --> D[Modular WC Splitting Knife Segments]
    C --> E[Hydraulic Plunger with Ceramic Rod]
    E -- Compresses --> D
    D -- Splits Material --> F(First Bale)
    D -- Splits Material --> G(Second Bale)
    F --> H[Ejection Chute Structure]
    G --> H
    D -- Affixed to --> I[Steel Knife Spine]
    I -- Mounted in --> J[Re-engineered Baling Chamber Structure]
    J -- Fasteners --> K[Quick-Release Pin Assemblies]
    K -- Maintenance --> L[Field Replacement]

2. Operational Parameter Expansion

Derivative 2.1: Micro-Baling Apparatus for Pharmaceutical Powders

Enabling Description:
A micro-baling apparatus designed for compacting pharmaceutical or chemical powders into small, precise "bale" tablets (e.g., 5mm x 5mm x 10mm). The baling chamber (38) and plunger (62) are scaled down to micro-electromechanical system (MEMS) dimensions, or precision machined from medical-grade stainless steel (e.g., 316L) or titanium alloy. The stationary splitting knife (64) is a micro-machined silicon nitride (Si3N4) or diamond-tipped tool, extending vertically from a polished sapphire substrate serving as the floor (40). The plunger's movement is controlled by a piezoelectric actuator or a micro-electromagnetic linear motor, providing sub-micron positional accuracy and millisecond cycle times. The "crop material" is finely powdered substance, precisely dosed into the micro-chamber via vibratory feeder or micro-fluidic channels. The "bales" are then ejected into sterile collection trays. The roof and floor are formed with micro-gaps for gas venting during compression.

stateDiagram-v2
    [*] --> Standby
    Standby --> Dose[Dose Powder]
    Dose --> Compress[Compress with Piezo Plunger]
    Compress --> Split[Split with Si3N4 Knife]
    Split --> Eject[Eject Micro-Bales]
    Eject --> Collect[Collect Sterile Micro-Bales]
    Collect --> Standby
    Standby --> Error: System Fault
    Dose --> Error: Dosing Error
    Compress --> Error: Compression Fault

Derivative 2.2: Industrial-Scale Biomass Compactor with High-Pressure Baling

Enabling Description:
An industrial-scale baling apparatus capable of compacting loose biomass (e.g., wood chips, municipal solid waste) at extreme pressures, forming large, high-density fuel bricks or construction blocks (e.g., 1m x 1m x 2m). The baling chamber (38) is fabricated from high-yield strength quenched and tempered steel (e.g., S690QL), with internal surfaces lined with abrasion-resistant hardfacing alloys (e.g., chromium carbide overlays). The plunger (62) is a multi-stage hydraulic ram system capable of exerting pressures up to 500 MPa. The stationary splitting knife (64) is a massive, heat-treated tool steel (e.g., D2 or H13) wedge, actively heated to 300°C via embedded resistive elements to reduce friction and assist material flow during extreme compression. The knife is anchored into the baling chamber floor (40) and roof (46) with massive bolted flange connections, designed to withstand multi-ton splitting forces. The spaced members in the roof and floor are robust I-beams or box sections, reinforced with gussets and stiffeners.

graph TD
    A[Bulk Biomass Feed] --> B(Pre-Compressor)
    B --> C{High-Pressure Baling Chamber}
    C --> D[Multi-Stage Hydraulic Plunger]
    C --> E[Heated Tool Steel Splitting Knife]
    D -- Applies 500 MPa --> E
    E -- Splits & Forms --> F(High-Density Biomass Block 1)
    E -- Splits & Forms --> G(High-Density Biomass Block 2)
    F --> H[Ejection System]
    G --> H
    H -- Discharges --> I[Industrial Output]
    C -- Structural Integrity --> J[Quenched & Tempered Steel Frame]
    J -- Abrasion Resist. --> K[CrC Hardfacing Liners]

3. Cross-Domain Application

Derivative 3.1: Automated Currency Note Bundling and Splitting System for Cash Processing

Enabling Description:
An automated system for bundling and splitting stacks of currency notes in a high-speed cash processing facility. The "baling chamber" (38) is a precision note-stacking and compression chamber. The "crop material" is stacks of banknotes, fed from a sorting machine. The "plunger" (62) is an electromagnetic linear motor driven compactor, precisely compressing the notes. The "stationary splitting knife" (64) is a thin, hardened stainless steel blade or a laser cutting/scoring mechanism, positioned to divide a compressed stack of notes into two sub-stacks (e.g., two bundles of 50 notes from a stack of 100). The blade has a leading edge and tapering sides, optimized for clean separation without damaging the notes. The roof and floor of the chamber use spaced polymer guides to hold the notes, and the knife passes through precision-machined slots in these guides. The ejection chute (70) would then deliver the split bundles into separate currency straps.

sequenceDiagram
    participant S as Sorting Machine
    participant C as Compression Chamber
    participant P as Linear Motor Plunger
    participant K as Splitting Knife
    participant E as Ejection Chute
    participant St as Strapping Units

    S ->> C: Feed 100-note Stack
    C ->> P: Request Compression
    P -->> C: Compress Stack
    C ->> K: Engage Knife
    K -->> C: Split Stack (50/50)
    C ->> E: Discharge Split Stacks
    E ->> St: Deliver Stack 1
    E ->> St: Deliver Stack 2
    St -->> S: Ready for next cycle

Derivative 3.2: Pharmaceutical Pill Blister Pack Forming and Division Apparatus

Enabling Description:
An apparatus for forming and dividing pre-formed strips of pharmaceutical pills within a continuous blister pack manufacturing line. The "baling chamber" (38) is a thermoforming station where individual pills are encapsulated into blisters, arranged in long strips. The "crop material" comprises these continuous blister pack strips. The "plunger" (62) is a pneumatic or servo-driven press that compresses a section of the blister strip against the stationary splitting knife. The "stationary splitting knife" (64) is a precision die-cutting blade or an ultrasonic cutting horn, mounted vertically within the thermoforming station. This knife is shaped with a leading cutting edge and tapering sides, designed to accurately sever the blister pack strip into multiple, uniform sub-strips (e.g., dividing a 10-pill strip into two 5-pill strips) without damaging the pills or compromising sterility. The roof and floor are part of the thermoforming molds, with specific channels for the splitting knife to pass through.

graph LR
    A[Pill Feed] --> B(Blister Film Unroll)
    B --> C(Thermoforming Station)
    C --> D[Pill Loading]
    D --> E[Sealing Station]
    E --> F{Baling Chamber: Blister Strip Accumulation}
    F --> G[Servo Press Plunger]
    F --> H[Ultrasonic Splitting Knife]
    G -- Compresses --> H
    H -- Splits Blister Strip --> I(Sub-Strip 1)
    H -- Splits Blister Strip --> J(Sub-Strip 2)
    I --> K[Packaging Unit 1]
    J --> L[Packaging Unit 2]

Derivative 3.3: Geo-Core Sample Division System for Geological Exploration

Enabling Description:
An automated system for dividing long, continuous geological core samples into multiple, standardized sub-samples for laboratory analysis. The "baling chamber" (38) is a linear core sample holding and alignment trough. The "crop material" is a continuous geological core sample (e.g., rock or sediment core). The "plunger" (62) is a hydraulic ram that advances the core sample against the stationary splitting knife. The "stationary splitting knife" (64) is a high-strength, diamond-impregnated wire saw, diamond-tipped circular saw blade, or a hydraulic wedge splitter, mounted to extend vertically from the trough's base. The knife's geometry has a leading cutting edge transverse to the core's path and tapering vertical edges, optimized for cleaving or sawing the geological core into two or more longitudinally split sections (e.g., for petrographic analysis on one half and geochemical analysis on the other) with minimal loss of material. The trough walls (roof and floor) comprise spaced sample guides and support rollers, with precision slots for the cutting element.

flowchart TD
    A[Raw Geo-Core Sample] --> B(Core Loading & Alignment)
    B --> C{Core Sample Holding Trough}
    C --> D[Hydraulic Advance Ram (Plunger)]
    C --> E[Diamond-Impregnated Wire Saw (Splitting Knife)]
    D -- Advances Core --> E
    E -- Splits Core --> F(Split Core Section A)
    E -- Splits Core --> G(Split Core Section B)
    F --> H[Lab Prep & Analysis A]
    G --> I[Lab Prep & Analysis B]

4. Integration with Emerging Tech

Derivative 4.1: AI-Optimized Baling with IoT Sensor Feedback and Predictive Maintenance

Enabling Description:
A baling apparatus where the baling operation is continuously monitored and optimized by an artificial intelligence (AI) agent. The baling chamber (38), plunger (62), and splitting knife (64) are instrumented with a comprehensive array of Internet of Things (IoT) sensors:

• Load cells: Integrated into the plunger face and knife mounting to measure compression force and splitting resistance.
• Vibration sensors (accelerometers): Mounted on the knife and plunger mechanism to detect wear patterns and impending mechanical failures.
• Optical density sensors: At the inlet (48) and within the baling chamber to determine crop material density and moisture content in real-time.
• Temperature sensors: On the knife to detect overheating.

Sensor data is streamed wirelessly (e.g., via LoRaWAN or 5G) to an edge computing unit running an AI model. This AI model (e.g., a recurrent neural network or deep reinforcement learning agent) dynamically adjusts plunger speed, compression force, and potentially baling chamber tension settings to optimize bale density, splitting efficiency, and energy consumption based on current crop material properties and predicted wear. The system implements predictive maintenance by alerting operators to anomalous sensor readings that indicate knife dulling, bearing wear, or hydraulic system degradation before catastrophic failure occurs, scheduling maintenance proactively.

graph TD
    A[Crop Material] --> B(Pickup Unit)
    B --> C{Baling Chamber}
    C --> D[Stationary Splitting Knife]
    C --> E[Plunger]
    C -- IoT Sensors --> F(Edge AI Compute Unit)
    D -- Load & Vibe Sensors --> F
    E -- Load & Vibe Sensors --> F
    C -- Optical & Temp Sensors --> F
    F -- Optimizes --> E
    F -- Predicts Faults --> G(Predictive Maintenance System)
    F -- Data Stream --> H(Cloud Analytics & Machine Learning)
    H -- Model Updates --> F
    G -- Alert --> I(Operator Interface)

Derivative 4.2: Real-time Bale Quality Assurance with Blockchain Traceability

Enabling Description:
A baling apparatus incorporating IoT sensors for real-time bale quality assessment and a blockchain-based system for immutable traceability. Each bale produced is fitted with an RFID tag or a QR code containing a unique identifier. Upon ejection, internal sensors measure bale density, moisture content, and dimensions. This data, along with GPS coordinates (from the baling apparatus's frame), date, time, crop type (input by operator or inferred from sensors), and specific machine parameters (plunger force, knife condition from self-diagnostics), is encrypted and timestamped. This aggregated data forms a block, which is then added to a private or consortium blockchain network (e.g., Hyperledger Fabric). This allows for complete, verifiable traceability of each bale from the field to storage and end-use, enabling rapid recall of affected bales in case of quality issues (e.g., high moisture content leading to spoilage) and providing transparency for agricultural supply chains.

sequenceDiagram
    participant B as Baling Apparatus
    participant S as IoT Sensors (Density, Moisture, GPS, etc.)
    participant R as RFID/QR Tag Printer
    participant E as Edge Processor
    participant C as Blockchain Network
    participant U as Supply Chain Users

    B ->> S: Form Bale
    S ->> E: Collect Bale Data (Density, Moisture, GPS, etc.)
    B ->> R: Apply Unique ID (RFID/QR)
    E ->> E: Encrypt & Timestamp Data
    E ->> C: Add Data Block to Blockchain
    C -->> U: Verify Bale Provenance & Quality
    U ->> C: Query Bale ID for History
    Note over C,U: Immutable Record for Traceability

5. The "Inverse" or Failure Mode

Derivative 5.1: Fail-Safe Retracting Splitting Knife with Overload Protection

Enabling Description:
A baling apparatus equipped with a fail-safe retracting stationary splitting knife (64) designed to prevent catastrophic damage from foreign objects or excessive material density. The knife is mounted on a spring-loaded or pneumatically actuated pivot mechanism at its base (through the floor's spaced members) and a shear-pin or magnetically latched support at its top (at the roof level). In the event of an overload condition (e.g., exceeding a pre-set threshold for plunger force, detected by load cells, or sudden impact detected by accelerometers), the top latch releases, and the knife pivots or retracts rearwardly and downwardly out of the plunger's path into a protective housing. This prevents knife breakage, plunger damage, or structural failure of the baling chamber. The system then enters a single-bale mode (by-passing the splitting function) or a diagnostic mode, alerting the operator to the foreign object or jam. A manual or automated reset mechanism re-engages the knife.

stateDiagram-v2
    [*] --> NormalOperation
    NormalOperation --> PlungerAdvance: Material Feed
    PlungerAdvance --> SplittingKnifeEngaged: Compression & Split
    SplittingKnifeEngaged --> NormalOperation: Bale Ejected

    SplittingKnifeEngaged --> OverloadDetected: High Plunger Force / Impact
    OverloadDetected --> KnifeRetracts: Latch Releases, Pivot/Retract
    KnifeRetracts --> SafetyMode: Single Bale or Diagnostic
    SafetyMode --> OperatorAlert
    OperatorAlert --> ManualReset: Operator Intervention
    ManualReset --> KnifeReEngages
    KnifeReEngages --> NormalOperation
    OverloadDetected --> KnifeDamage: If Retraction Fails (Critical Failure)

Derivative 5.2: Low-Power/Limited-Functionality Diagnostic Baling Mode

Enabling Description:
A baling apparatus with a selectable "low-power" or "limited-functionality" diagnostic mode, designed for testing system components and verifying functionality with minimal energy consumption or material processing. In this mode, the main power to the pickup unit (50) and main hydraulic pump for the plunger (62) is reduced or disabled. Instead, a smaller auxiliary electric motor or a dedicated diagnostic hydraulic circuit actuates the plunger at a significantly reduced speed and force (e.g., 10% of operational capacity), cycling it through its full range of motion. The stationary splitting knife (64) remains in position. This mode allows for visual inspection of knife alignment, plunger travel, and the operation of knot-tying mechanisms (52) without actually baling crop material. Sensors (e.g., position encoders on the plunger, current sensors on motors) continue to operate, providing diagnostic feedback on component health and calibration to a local diagnostic display or remote monitoring system. This mode can be activated for pre-season checks or post-repair verification.

graph TD
    A[Baling Apparatus] --> B(Control System)
    B -- Select --> C{Operating Mode}
    C -- Normal --> D[Full Power Operation]
    C -- Diagnostic --> E[Low-Power/Limited-Functionality Mode]
    E --> F(Reduced Plunger Speed/Force)
    E --> G(Auxiliary Motor/Hydraulic)
    E --> H(Knotter Cycle Test)
    E --> I(Sensor Feedback Monitoring)
    I --> J[Diagnostic Display/Report]
    F -- No Material --> K(Knife Position Check)
    G -- Visual Inspect --> L(Component Alignment)

Combination Prior Art Scenarios with Open-Source Standards

Here are three scenarios combining US Patent 12256676 with existing open-source standards, demonstrating how such combinations could render further incremental improvements obvious.

Combination 1: US12256676 with ROS (Robot Operating System) for Autonomous Baling Operations

Scenario: An autonomous baling apparatus based on the core mechanics of US12256676 (stationary splitting knife, plunger, baling chamber) but integrated with the Robot Operating System (ROS) framework for navigation, perception, and control.

Enabling Description:
The baling apparatus of US12256676 is outfitted with a ROS-enabled onboard computing platform (e.g., based on an NVIDIA Jetson or Raspberry Pi cluster). This platform interfaces with GPS/RTK modules, LiDAR scanners, ultrasonic sensors, and optical cameras to perceive the field environment and crop rows. ROS nodes are developed for:

• Navigation Stack: Utilizing move_base for path planning and obstacle avoidance across the field.
• Perception Nodes: Processing LiDAR and camera data for crop row detection, density estimation, and foreign object detection.
• Control Nodes: Interfacing with the baler's internal control units (e.g., CAN bus or Modbus TCP) to command plunger speed, baling chamber tension, and ejection chute timing.
• Baling Logic Node: Implementing the core baling and splitting logic of US12256676, with parameters dynamically adjusted based on perception data (e.g., increasing plunger force for denser crop patches).

This combination, using established open-source robotic frameworks, makes the concept of an autonomous, intelligent baling machine employing the described splitting mechanism obvious.

graph TD
    A[Field Environment] --> B(Lidar/Camera/GPS Sensors)
    B --> C{ROS Master Node}
    C -- Nav_Stack --> D[Path Planning & Obstacle Avoidance]
    C -- Perception --> E[Crop Detection & Density]
    C -- Baling_Logic --> F[Baling Control Unit]
    F -- Commands --> G[Plunger (US12256676)]
    F -- Commands --> H[Splitting Knife (US12256676)]
    F -- Commands --> I[Ejection Chute (US12256676)]
    G --> J[Baling Chamber]
    H --> J
    I --> J
    J -- Output --> K[Spaced Bales]
    D -- Movement --> L[Tractor/Self-Propelled Frame]

Combination 2: US12256676 with MQTT Protocol for Remote Monitoring and Control

Scenario: A baling apparatus based on US12256676's design, enhanced with real-time remote monitoring and control capabilities using the Message Queuing Telemetry Transport (MQTT) open-source protocol.

Enabling Description:
The baling apparatus includes an embedded gateway (e.g., an ESP32 or industrial IoT gateway) capable of collecting operational data (plunger cycles, bale count, sensor readings for knife wear, hydraulic pressure, engine RPM) from the baler's internal control systems. This gateway acts as an MQTT client, publishing telemetry data to an MQTT broker running on a cloud server or local farm network. An MQTT client application on a smartphone, tablet, or web dashboard subscribes to these topics, allowing farmers or maintenance personnel to monitor the baler's status, performance, and bale production in real-time from any location. Control commands (e.g., initiating a diagnostic mode, adjusting bale density parameters within safe limits) can also be published to specific MQTT topics from the remote client, which the gateway subscribes to and relays to the baler's control unit. This leverages an existing lightweight, publish-subscribe messaging protocol for M2M communication.

graph TD
    A[Baling Apparatus (US12256676)]
    A --> B(Internal Control Unit)
    B -- Data --> C[Embedded IoT Gateway]
    C -- MQTT Publish --> D(MQTT Broker - Cloud/Farm)
    D -- MQTT Subscribe --> E[Remote Monitoring Dashboard]
    D -- MQTT Subscribe --> F[Mobile Control App]
    E -- Display --> G[Real-time Telemetry]
    F -- Send Commands --> B
    G --> H[Alerts & Notifications]

Combination 3: US12256676 with OPC UA for Standardized Industrial Integration

Scenario: Integrating the baling apparatus of US12256676 into a larger agricultural automation ecosystem using the OPC Unified Architecture (OPC UA) open-source standard for secure and reliable data exchange.

Enabling Description:
The baling apparatus incorporates an OPC UA server, exposing its operational data model (e.g., bale statistics, machine state, error codes, sensor values for knife performance, plunger force, crop density) as OPC UA nodes. This allows seamless and standardized communication with other industrial control systems, SCADA platforms, or manufacturing execution systems (MES) within a smart farm environment. An OPC UA client application (e.g., running on a farm management system or a programmable logic controller - PLC) can browse the baler's OPC UA address space, read current values, write control parameters (where permitted), and subscribe to events and alarms. This enables the baler to automatically synchronize its operations with other machinery (e.g., forage harvesters, bale accumulators) and contribute data to farm-wide analytics for overall operational efficiency and resource management. The OPC UA information model can define specific objects for "BalingChamber," "SplittingKnife," and "BaleOutput" with associated variables and methods.

classDiagram
    class BalingApparatus {
        +BalingChamber chamber
        +Plunger plunger
        +SplittingKnife knife
        +EjectionChute ejection
        +OPCUAServer opcUAServer
    }
    class OPCUAServer {
        +publishData(nodeId, data)
        +subscribeTo(nodeId)
        +invokeMethod(nodeId, method)
    }
    class FarmManagementSystem {
        +OPCUAClient opcUAClient
        +monitorBaler()
        +adjustBalerParams()
    }
    class PLC {
        +OPCUAClient opcUAClient
        +syncWithBaler()
    }
    class SCADAMonitor {
        +OPCUAClient opcUAClient
        +displayStatus()
    }

    BalingApparatus "1" -- "1" OPCUAServer
    FarmManagementSystem "1" -- "1" OPCUAClient
    PLC "1" -- "1" OPCUAClient
    SCADAMonitor "1" -- "1" OPCUAClient
    OPCUAClient "N" -- "1" OPCUAServer : connects to