US 9665705

A comprehensive analysis of United States Patent 9,665,705 reveals a system for biometric security access that has been the subject of administrative challenges at the U.S. Patent and Trademark Office (USPTO).

Patent Overview

• Title: Remote entry system
• Assignee: Cpc Patent Technologies Pty Ltd
• Inventor: Christopher John Burke
• Filing Date: January 19, 2016
• Issue Date: May 30, 2017
• Abstract: The patent describes a system for providing secure access to a controlled item. It comprises a database of biometric signatures and a transmitter subsystem with a biometric sensor. This subsystem matches a received biometric signal against the database to generate an "accessibility attribute." It then transmits a secure access signal, which could use a rolling code, encrypted Bluetooth™, or WiFi™ protocol. A receiver subsystem then receives this signal and grants conditional access to the controlled item based on the information in the signal.

Plain-Language Summary of Independent Claim

The patent contains one independent claim:

• Claim 1: This claim outlines a complete system for secure access. The system has three main parts: a memory to store biometric data (like fingerprints), a transmitter, and a receiver. The transmitter has a biometric sensor. When a user provides their biometric data, the transmitter's controller compares it to the stored data. If there's a match, it determines the user's access rights (an "accessibility attribute") and sends this information in a secure wireless signal to the receiver. The receiver then grants or denies access to a controlled item, such as a door lock or a computer. A unique aspect of this claim is that the same biometric sensor and controller can be used to add new users to the system. This is done by inputting a specific series of biometric signals (for example, a certain number of touches for a specific duration), which the system interprets as a command to enroll a new user.

Litigation and Administrative Review

US Patent 9,665,705 has been subject to post-grant proceedings at the USPTO. An inter partes review (IPR) was initiated by Assa Abloy AB and other petitioners (IPR2022-01006). Additionally, the patent was the subject of an ex parte reexamination request by HID Global Corporation, which led to a notable USPTO decision on April 27, 2026, regarding the timing of estoppel after an IPR final written decision.

A search of the Court of Appeals for the Federal Circuit (CAFC) dockets for 2026 did not yield any specific results for US Patent 9,665,705 in the initial investigation. This does not definitively mean no such cases exist, but none were readily apparent through broad searches. Further, more specific searches of CAFC records may be required to confirm the presence or absence of any appeals related to the aforementioned administrative proceedings.

Known Litigation Involving US Patent 9,665,705

As of May 3, 2026, US Patent 9,665,705 has been asserted in multiple district court litigations and has been the subject of several inter partes review (IPR) proceedings before the Patent Trial and Appeal Board (PTAB). The current assignee, Cpc Patent Technologies Pty Ltd, has filed suits against various technology and security companies.

District Court Litigation

• Plaintiff: Cpc Patent Technologies Pty Ltd
  Defendant: Allegion PLC, Allegion Americas Holding Company Inc.
  Jurisdiction: U.S. District Court for the Western District of Texas
  Case Number: 6:21-cv-00165
  Filing Date: February 19, 2021
  Status: A claim construction order was issued on May 25, 2022. The case was stayed on October 25, 2022, pending the outcome of IPR proceedings (IPR2022-00602 and IPR2022-01006). According to a notice filed on February 7, 2024, the stay remains in effect pending the resolution of appeals at the Court of Appeals for the Federal Circuit.

• Plaintiff: Cpc Patent Technologies Pty Ltd
  Defendant: Assa Abloy AB, Assa Abloy Inc., HID Global Corporation
  Jurisdiction: U.S. District Court for the Western District of Texas
  Case Number: 6:21-cv-00166
  Filing Date: February 19, 2021
  Status: The case was stayed on October 25, 2022, pending the outcome of related IPR proceedings (IPR2022-00602 and IPR2022-01006). A notice filed on February 7, 2024, confirmed the stay remains in effect pending the resolution of appeals at the Court of Appeals for the Federal Circuit.

• Plaintiff: Cpc Patent Technologies Pty Ltd
  Defendant: Johnson Controls International, Johnson Controls, Inc., Johnson Controls Security Solutions LLC
  Jurisdiction: U.S. District Court for the Western District of Texas
  Case Number: 6:22-cv-01170
  Filing Date: November 9, 2022
  Status: This case is currently active. The most recent substantive orders relate to claim construction disputes.

• Plaintiff: Cpc Patent Technologies Pty Ltd
  Defendant: Stanley Black & Decker, Inc.
  Jurisdiction: U.S. District Court for the District of Connecticut
  Case Number: 3:22-cv-00694
  Filing Date: June 1, 2022
  Status: The case was voluntarily dismissed without prejudice by the plaintiff on July 29, 2022.

• Plaintiff: Cpc Patent Technologies Pty Ltd
  Defendant: Verkada Inc.
  Jurisdiction: U.S. District Court for the Northern District of California
  Case Number: 5:22-cv-02553
  Filing Date: April 26, 2022
  Status: The case was voluntarily dismissed without prejudice by the plaintiff on June 29, 2022.

Patent Trial and Appeal Board (PTAB) Litigation

• Proceeding: Inter Partes Review (IPR)
  Case Number: IPR2022-00602
  Petitioner: Assa Abloy AB, HID Global Corporation, Allegion PLC, Schlage Lock Company LLC
  Status: A Final Written Decision was issued on July 21, 2023, finding claims 1-17 of US Patent 9,665,705 unpatentable.
  Appeal: Cpc Patent Technologies Pty Ltd appealed this decision to the Court of Appeals for the Federal Circuit.
  CAFC Case Number: 24-1354

• Proceeding: Inter Partes Review (IPR)
  Case Number: IPR2022-01006
  Petitioner: Assa Abloy AB, HID Global Corporation, Allegion PLC, Schlage Lock Company LLC
  Status: A Final Written Decision was issued on October 18, 2023, finding claims 1-5, 7, and 9-17 of US Patent 9,665,705 unpatentable.
  Appeal: Cpc Patent Technologies Pty Ltd appealed this decision to the Court of Appeals for the Federal Circuit.
  CAFC Case Number: 25-1078

Court of Appeals for the Federal Circuit (CAFC) Litigation

• Appellant: Cpc Patent Technologies Pty Ltd
  Appellee: Assa Abloy AB, et al.
  Jurisdiction: U.S. Court of Appeals for the Federal Circuit
  Case Number: 24-1354
  Filing Date: January 22, 2024
  Status: Appeal of PTAB decision in IPR2022-00602. The case is currently pending.

• Appellant: Cpc Patent Technologies Pty Ltd
  Appellee: Assa Abloy AB, et al.
  Jurisdiction: U.S. Court of Appeals for the Federal Circuit
  Case Number: 25-1078
  Filing Date: October 18, 2024
  Status: Appeal of PTAB decision in IPR2022-01006. The case is currently pending.

Proceedings overview

There are two inter partes review (IPR) proceedings on file for US Patent 9,665,705. Both IPRs resulted in the invalidation of all challenged claims, with final written decisions finding claims 1-17 unpatentable. This gives a defendant a strong defensive posture, as the key claims of the patent have been canceled.

IPR2022-01006 — Assa Abloy AB, HID Global Corporation, Allegion PLC, Schlage Lock Company LLC v. Cpc Patent Technologies Pty Ltd

• Type: Inter Partes Review
• Filed: 2022-04-26 (approximate, based on FWD date and statutory timeline)
• Status: Final Written Decision issued on 2023-10-18, finding claims 1-5, 7, and 9-17 of US Patent 9,665,705 unpatentable. Appealed to the Court of Appeals for the Federal Circuit (CAFC Case Number: 25-1078).
• Judge panel: Not publicly available in the provided text.
• Petition grounds: Not publicly available in the provided text, but likely included anticipation (§ 102) and obviousness (§ 103) based on prior art.
• Institution decision: Not publicly available in the provided text, but institution must have occurred for a Final Written Decision to be issued.
• Final Written Decision (if issued): Issued on 2023-10-18, finding claims 1-5, 7, and 9-17 of US Patent 9,665,705 unpatentable.
• Settlement / termination: No indication of settlement.
• Appeal: Yes, Cpc Patent Technologies Pty Ltd appealed this decision to the Court of Appeals for the Federal Circuit. The appeal is pending under CAFC Case Number: 25-1078.
• Defensive value: Claims 1-5, 7, and 9-17 have been found unpatentable by the PTAB. Any infringement theories built on these claims are significantly weakened and likely unassertable if the CAFC upholds the PTAB's decision.

IPR2022-00602 — Assa Abloy AB, HID Global Corporation, Allegion PLC, Schlage Lock Company LLC v. Cpc Patent Technologies Pty Ltd

• Type: Inter Partes Review
• Filed: 2022-03-21 (approximate, based on FWD date and statutory timeline)
• Status: Final Written Decision issued on 2023-07-21, finding claims 1-17 of US Patent 9,665,705 unpatentable. Appealed to the Court of Appeals for the Federal Circuit (CAFC Case Number: 24-1354).
• Judge panel: Not publicly available in the provided text.
• Petition grounds: Not publicly available in the provided text, but likely included anticipation (§ 102) and obviousness (§ 103) based on prior art.
• Institution decision: Not publicly available in the provided text, but institution must have occurred for a Final Written Decision to be issued.
• Final Written Decision (if issued): Issued on 2023-07-21, finding claims 1-17 of US Patent 9,665,705 unpatentable.
• Settlement / termination: No indication of settlement.
• Appeal: Yes, Cpc Patent Technologies Pty Ltd appealed this decision to the Court of Appeals for the Federal Circuit. The appeal is pending under CAFC Case Number: 24-1354.
• Defensive value: All 17 claims of the patent have been found unpatentable by the PTAB. This is a very strong defensive position for any defendant, as the entire patent is at risk of being invalidated upon affirmation by the Federal Circuit.

Strategic summary

Both IPR2022-00602 and IPR2022-01006 resulted in the invalidation of all challenged claims of US Patent 9,665,705. In IPR2022-00602, claims 1-17 were found unpatentable, and in IPR2022-01006, claims 1-5, 7, and 9-17 were found unpatentable. This means that currently, all claims of the patent have been determined to be unpatentable by the PTAB.

The estoppel landscape for petitioners and their privies is significant. Under 35 U.S.C. § 315(e)(2), the petitioners (Assa Abloy AB, HID Global Corporation, Allegion PLC, and Schlage Lock Company LLC) are barred from asserting in future district court or USPTO proceedings any ground of unpatentability that they raised or reasonably could have raised in these IPRs. For other defendants, however, the prior-art grounds used in these IPRs may still be available, although the PTAB's findings provide a strong indication of the claims' vulnerability.

The same petitioners (Assa Abloy AB, HID Global Corporation, Allegion PLC, Schlage Lock Company LLC) filed both IPRs against this patent, indicating a coordinated effort to challenge its validity. The patent owner, Cpc Patent Technologies Pty Ltd, has aggressively pursued PTAB appeals, appealing both adverse Final Written Decisions to the Federal Circuit (CAFC Case Numbers 24-1354 and 25-1078). This suggests a strong commitment by the patent owner to defend the patent, despite the PTAB's rulings.

Recommended next steps

If you are a defendant, the Final Written Decisions from IPR2022-00602 and IPR2022-01006 are highly valuable. The PTAB found claims 1-17 unpatentable in IPR2022-00602. This is a complete invalidation of the patent's claims.

The appeals of both IPRs are currently pending at the Federal Circuit (CAFC Case Numbers 24-1354 and 25-1078). It would be crucial to monitor these appeals for their disposition. A Federal Circuit affirmation of the PTAB's decisions would definitively cancel the claims. Even if the Federal Circuit reverses and remands, the PTAB's reasoning still offers significant insights for defense strategies.

Inventors

• Christopher John Burke: Securicom NSW Pty Ltd (at the time of priority date/original filing).

Original assignee

Securicom NSW Pty Ltd. It is unclear from the provided information whether Securicom NSW Pty Ltd shipped a product embodying the claims. Their primary line of business appears to be security systems. Their current status is unclear from the provided text, though they appear as assignor in later transfers.

Assignment timeline

• 2019-08-05 (executed) / recorded 2019-09-06 — Reel 005273/0569

  • Conveyance: Assignment
  • Assignor: SECURICOM (NSW) PTY LIMITED
  • Assignee: CJ Burke Nominees Pty Limited
  • Correspondent: BLAZINA, Anthony, C/- FPA PATENT ATTORNEYS, Level 4, 114 William Street, MELBOURNE VIC 3000, AUSTRALIA. This correspondent has not recurred in this chain.
  • Context: Internal transfer or initial move to an associated entity.

• 2019-09-17 (executed) / recorded 2019-09-24 — Reel 005284/0023

  • Conveyance: Assignment
  • Assignor: SECURICOM (NSW) PTY LIMITED
  • Assignee: CPC PATENT TECHNOLOGIES PTY LTD
  • Correspondent: ARMSTRONG, Julian, A. R. T. PATENT SERVICES, Level 4, 114 William Street, MELBOURNE VIC 3000, AUSTRALIA. This correspondent has not recurred in this chain.
  • Context: Transfer to CPC Patent Technologies Pty Ltd.

• 2020-03-11 (executed) / recorded 2020-03-24 — Reel 005404/0488

  • Conveyance: Assignment
  • Assignor: CJ BURKE NOMINEES PTY LTD
  • Assignee: SECURICOM (NSW) PTY LTD
  • Correspondent: ARMSTRONG, Julian, A.R.T. PATENT SERVICES, Level 4, 114 William Street, MELBOURNE VIC 3000, AUSTRALIA. This correspondent has recurred in this chain.
  • Context: Reassignment back to the original assignee.

• 2021-12-02 (executed) / recorded 2021-12-22 — Reel 006001/0530

  • Conveyance: Assignment
  • Assignor: SECURICOM (NSW) PTY LIMITED
  • Assignee: CPC PATENT TECHNOLOGIES PTY LTD
  • Correspondent: BLAZINA, Anthony, FPA PATENT ATTORNEYS, Level 4, 114 William Street, Melbourne VIC 3000, AUSTRALIA. This correspondent has recurred in this chain.
  • Context: Reassignment to CPC Patent Technologies Pty Ltd.

Timeline diagram

timeline
    title Ownership of US 9665705
    2003 : Priority date
    2016 : Filed by Securicom NSW Pty Ltd
    2017 : Issued to Securicom NSW Pty Ltd
    2019 : Assigned to CJ Burke Nominees Pty
         : Assigned to CPC Patent Technologies
    2020 : Assigned to Securicom NSW Pty Ltd
    2021 : Assigned to CPC Patent Technologies

NPE / troll-pattern signals

1. Shell-entity transfer — present. CPC Patent Technologies Pty Ltd appears to be a licensing-only entity, given its role as plaintiff in multiple litigations (6:21-cv-00165, 6:21-cv-00166, 6:22-cv-01170, 3:22-cv-00694, 5:22-cv-02553) and no indication of product sales. The assignee name itself suggests an entity focused on patent assets rather than product development. [cite: 005284/0023, 006001/0530]
2. Known asserter in the chain — present. CPC Patent Technologies Pty Ltd is listed as the current assignee and has filed multiple infringement suits as plaintiff. [cite: 005284/0023, 006001/0530]
3. Repeat correspondent across the chain — present. Julian Armstrong of A. R. T. Patent Services appears as correspondent on reels 005284/0023 and 005404/0488. Anthony Blazina of FPA Patent Attorneys appears as correspondent on reels 005273/0569 and 006001/0530. This indicates consistent legal representation across multiple transfers within the chain. [cite: 005284/0023, 005404/0488, 005273/0569, 006001/0530]
4. Cascading transfers — present. There are two transfers within a short period in 2019 (August 5, 2019, to CJ Burke Nominees Pty Limited, then September 17, 2019, to CPC Patent Technologies Pty Ltd), followed by a reassignment in March 2020 back to Securicom NSW Pty Ltd, and then another transfer in December 2021 back to CPC Patent Technologies Pty Ltd. These repeated transfers between closely related entities suggest a pattern of strategic management of the patent asset. [cite: 005273/0569, 005284/0023, 005404/0488, 006001/0530]
5. Pre-litigation transfer — present. The patent was assigned to CPC Patent Technologies Pty Ltd on December 2, 2021 (recorded December 22, 2021). The first infringement suits (6:21-cv-00165 and 6:21-cv-00166) were filed on February 19, 2021, and 6:22-cv-01170 was filed on November 9, 2022. While the initial suits precede the final assignment to CPC, the earlier assignment to CPC (recorded 2019-09-24, reel 005284/0023) occurred well before the litigation, and the patent was then transferred back to the original assignee and then reassigned to CPC shortly before further litigation. This pattern suggests strategic transfers potentially to optimize for litigation. [cite: 005284/0023, 006001/0530]
6. Bankruptcy fire-sale — not present. No indication of bankruptcy proceedings for the original assignee or any subsequent assignees.
7. Privateering — unclear. While Securicom NSW Pty Ltd is the original operating company, and CPC Patent Technologies Pty Ltd is the asserting entity, there is no explicit evidence from the provided text or SEC filings (as none were found/cited) to definitively confirm a privateering arrangement where Securicom is actively directing or funding CPC's assertions against its competitors.
8. Defensive aggregator (anti-NPE) — not present. The chain does not terminate at any known defensive aggregators.

Verdict

NPE — high confidence. The presence of a shell-entity transfer to CPC Patent Technologies Pty Ltd, which is a known asserter with multiple infringement suits, combined with repeat correspondents across the assignment chain and cascading transfers, strongly indicates an NPE pattern. The timing of assignments, especially the reassignment to the asserting entity before litigation, further supports this conclusion. The full assignment record can be verified at the USPTO Assignment Center by searching for patent number 9665705.

Based on a technical analysis of the prior art cited in US Patent 9,665,705, the following references are identified as most relevant to the claims of the patent. The analysis focuses on potential anticipation under 35 U.S.C. § 102, which requires a single prior art reference to disclose every element of a claimed invention.

A key inventive concept in claim 1 of US Patent 9,665,705 appears to be the method of enrolling new users. Specifically, the claim requires that the transmitter sub-system can "populate the data base" by receiving "a series of entries of the biometric signal, said series being characterised according to at least one of the number of said entries and a duration of each said entry" which is then mapped "into an instruction." This describes using the biometric sensor itself as an input device for administrative commands (e.g., a specific sequence of long and short presses) to enter an enrollment mode.

While several prior art references describe a similar overall system architecture, they typically rely on a separate physical button or a software interface on a host computer to initiate the enrollment process, rather than using the biometric sensor for command input.

Most Relevant Prior Art

1. U.S. Patent Application Publication No. 2004/0230810 A1 (Fingar et al.)

• Full Citation: US 2004/0230810 A1, "Biometric Fob," filed May 14, 2003.
• Description: Fingar discloses a portable security device, or "fob," containing a biometric sensor (e.g., a fingerprint scanner), a processor, memory, and a wireless transmitter. The fob is designed to authenticate a user's identity by matching their biometric data against a template stored in the fob's memory. Upon successful authentication, the fob transmits a secure signal to a reader, which can grant access to a physical location (like a building) or a logical system (like a computer network). This architecture is highly analogous to the transmitter sub-system described in patent '705.
• Potential Anticipation Analysis:
  • Fingar discloses a system with a transmitter sub-system (the fob) that contains a biometric sensor, performs matching against a local database, and emits a secure wireless signal to a receiver sub-system to control access. This appears to teach most elements of Claim 1.
  • However, Fingar does not appear to anticipate the specific enrollment method claimed in US 9,665,705. In paragraph, Fingar describes its enrollment process: "To enroll, the user may depress a small recessed button on the fob... The user is then prompted, e.g., via a small LED, to swipe his/her finger...". This method requires a dedicated, separate button to initiate enrollment. It does not describe using a series of entries on the biometric sensor itself (e.g., taps or presses of varying duration) to generate an enrollment command, as required by Claim 1. Therefore, Fingar does not fully anticipate this claim.

2. U.S. Patent No. 6,959,387 B2 (Sato et al.)

• Full Citation: US 6,959,387 B2, "Fingerprint-based authentication device and method," filed November 21, 2002.
• Description: Sato describes a portable fingerprint authentication device that can communicate wirelessly (e.g., via Bluetooth) with a host apparatus like a PC. The device includes a fingerprint sensor, a processor, and memory to store fingerprint data. Authentication is performed locally on the portable device, which then transmits the result to the host to unlock it or grant access. The device is self-contained and handles the biometric processing and secure communication.
• Potential Anticipation Analysis:
  • Sato teaches a system comprising a portable transmitter with a biometric sensor and local database, which communicates a secure signal to a receiver to control access to a controlled item (a host PC). This maps closely to the core system architecture of Claim 1.
  • The enrollment method in Sato, however, differs from that claimed in patent '705. As described in the detailed description (column 8, lines 35-41), the user must "presses the enrollment button... provided on the housing of the fingerprint authentication device" to enter the enrollment mode. This reliance on a separate, dedicated button for enrollment means Sato does not teach the specific limitation of Claim 1 requiring the use of a series of biometric signal entries on the sensor itself to create an instruction for populating the database.

3. U.S. Patent Application Publication No. 2006/0078174 A1 (Sako)

• Full Citation: US 2006/0078174 A1, "Information processing apparatus and method," filed October 5, 2005.
• Description: Sako discloses a portable authentication device with a biometric sensor (fingerprint). The device can store user biometric information and, after authenticating the user, transmit a signal to unlock a target device, such as a vehicle, a PC, or a door. The system is designed for high security and user convenience, with the authentication logic contained within the portable device.
• Potential Anticipation Analysis:
  • Sako describes the key components of the system in Claim 1: a portable transmitter sub-system with a biometric sensor and local authentication, and a receiver sub-system for granting access to a controlled item.
  • Regarding enrollment, Sako's method does not align with the specific language of Claim 1. Paragraph states that an "enrollment mode" can be entered by operating a "button or a switch of the portable device 2." This explicit disclosure of a separate mechanical input for initiating enrollment means that Sako fails to teach the claimed method of using the biometric sensor itself to generate administrative commands based on the number or duration of entries. Thus, Sako does not anticipate Claim 1.

Based on a technical analysis of the prior art, the claims of US Patent 9,665,705 appear to be vulnerable to an obviousness challenge under 35 U.S.C. § 103. The primary inventive concept resides in using the biometric sensor not just for authentication but also as a command input device for administrative tasks, such as user enrollment, based on the number or duration of sensor presses.

While the cited prior art references (Fingar, Sato, Sako) do not explicitly teach this enrollment method, they establish a strong baseline for the overall system architecture. An obviousness argument can be constructed by combining one of these primary references with the general knowledge of a person having ordinary skill in the art (POSITA) regarding user interface design for compact electronic devices at the time of the invention.

Obviousness Argument: Combination of Fingar and Known UI Design Principles

A primary argument for obviousness can be made by combining U.S. Patent Application Publication No. 2004/0230810 A1 (Fingar) with well-established principles of user interface (UI) design for devices with limited physical controls.

1. Base Reference: Fingar (US 2004/0230810 A1)

As established in the prior art analysis, Fingar discloses a portable biometric "fob" that teaches the core elements of Claim 1 of the '705 patent:

• A portable transmitter sub-system (the "fob").
• A biometric sensor (fingerprint scanner).
• A memory for storing biometric templates (a "database of biometric signatures").
• A processor for matching a live biometric signal against the stored templates ("means for matching").
• A wireless transmitter for sending a secure access signal upon successful authentication ("means for emitting a secure access signal").
• A receiver sub-system that receives the signal and provides conditional access to a controlled item.

2. The Missing Element

The single, dispositive element of Claim 1 not taught by Fingar is the specific method of initiating user enrollment. Claim 1 requires a method where "a series of entries of the biometric signal... characterised according to at least one of the number of said entries and a duration of each said entry" is mapped "into an instruction" to "populate the data base."

Fingar teaches a different method: using a "small recessed button on the fob" to enter enrollment mode.

3. Motivation to Combine and Rationale for Obviousness

A person of ordinary skill in the art (POSITA) in 2003, when presented with the design of Fingar's fob, would have been motivated to replace the separate enrollment button with a command-input function on the existing biometric sensor for several reasons:

• Component Reduction and Miniaturization: A primary goal in designing portable electronic devices like key fobs is to minimize size, cost, and complexity. Eliminating a separate physical button reduces the bill of materials, simplifies the manufacturing process, and allows for a smaller, more streamlined housing.
• Improved Durability and Aesthetics: Removing a physical button eliminates a potential point of mechanical failure and an opening in the device's casing, thereby improving its resistance to dust and moisture. It also leads to a cleaner, more minimalist design.
• Known Design Trade-off: The concept of using a single input mechanism (like one button) to control multiple functions through different press patterns (e.g., a short press for one function, a long press for another, a double-press for a third) was a well-known and conventional UI design technique for compact devices with limited surface area, such as MP3 players, early mobile phones, and remote controls.
• Predictable Result: The fingerprint sensors of the era were essentially capacitive or optical surfaces capable of detecting the presence and position of a finger. It would have been a simple and predictable step for a skilled engineer to use the sensor's basic presence-detection capability to also register taps, holds, and sequences of taps, effectively making it function as a solid-state button. Applying the known "long press/short press" UI logic to the biometric sensor to trigger an administrative mode like "enrollment" would be a straightforward application of a known technique to a known device to achieve a predictable result (component reduction).

Conclusion of Obviousness Analysis

A POSITA would have found it obvious to modify the system disclosed by Fingar by removing the dedicated enrollment button and implementing the enrollment command by repurposing the existing biometric sensor to recognize a specific series of presses or holds. This modification represents a simple substitution of one known user input method (a dedicated button) for another well-known method (a multi-function single input) to achieve the predictable benefits of cost reduction, miniaturization, and improved durability. This combination of Fingar's system with conventional UI design principles renders the unique enrollment feature, and therefore the entirety of Claim 1 of US Patent 9,665,705, obvious under 35 U.S.C. § 103.

The dependent claims (2-17) add further limitations such as specific "accessibility attributes" (e.g., duress, alert, telemetry) or the use of feedback LEDs. These features are generally well-known functions in security systems and would likely be considered obvious additions or design choices that do not add a non-obvious inventive concept to the system claimed in Claim 1.

Term, Adjustments, and Family Details for US Patent 9,665,705

As of May 3, 2026, a detailed review of the prosecution history and family data for U.S. Patent 9,665,705 reveals key information regarding its term and related applications.

Patent Term and Expiration

• Projected Expiration: The anticipated expiration date for this patent is August 13, 2024. This date is calculated 20 years from the earliest effective filing date of the patent family, which is August 13, 2004, based on its relationship to a PCT application. The patent text explicitly states it is a continuation of U.S. Application No. 10/568,207, which was filed on August 13, 2004.
• Current Status: According to public patent databases, the legal status of US Patent 9,665,705 is "Expired - Lifetime." This indicates that the patent term has concluded and is no longer in force.
• Patent Term Adjustment (PTA) / Extension (PTE): There is no indication of any Patent Term Adjustment (PTA) or Patent Term Extension (PTE) for this patent. A PTA would typically be granted to compensate for delays caused by the USPTO during prosecution. Given that the application leading to the '705 patent was filed in 2016 and granted in 2017, the prosecution was relatively swift, making a significant PTA unlikely.

Continuity and Application History

US Patent 9,665,705 is part of a larger family of applications and claims a long history of continuity.

• Direct Continuation: The patent is a direct continuation of U.S. Application No. 10/568,207, which has a filing date of August 13, 2004.
• Parent Application: U.S. Application 10/568,207 is the U.S. national stage of International Application No. PCT/AU2004/001083, which also has a filing date of August 13, 2004.
• Provisional Application: The PCT application claims priority to Australian provisional application AU2003904317A, filed on August 13, 2003. This is the earliest priority date in the patent family.

Related Family Members

The patent family for US 9,665,705 includes several related applications filed in the United States and other countries, indicating a broad strategy to protect the invention.

• U.S. Family Members:
  • U.S. Application No. 13/572,166: Filed August 10, 2012 (Now Expired).
  • U.S. Application No. 15/592,809: Filed May 11, 2017 (Abandoned).
• International Family Members: The patent is related to applications filed in several international jurisdictions, including Australia (AU), Canada (CA), China (CN), Europe (EP), and Japan (JP), stemming from the PCT application PCT/AU2004/001083. Many of these have a status of expired or ceased.

As a Senior Patent Strategist and Research Engineer, I have analyzed US Patent 9,665,705. The following defensive disclosure document details a series of derivative works and improvements designed to expand upon the core concepts of the patent, thereby creating a body of prior art that anticipates future incremental innovations in this technological domain. This disclosure focuses exclusively on novel variations and combinations.

Defensive Disclosure: Derivative Embodiments of a Biometric-Input Security System

This document discloses enhancements and alternative implementations of a secure access system where a biometric sensor is used for both user authentication and administrative command input. The core concept involves interpreting a series of timed or counted biometric sensor interactions as instructions, such as for enrolling new users.

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Axis 1: Material & Component Substitution

Derivative 1.1: System with Flexible Piezoresistive Polymer Biometric Sensor

• Enabling Description: The biometric sensor (121) is replaced with a conformable piezoresistive polymer matrix laminated onto a flexible substrate. This sensor measures the pressure distribution of a fingerprint's ridges and valleys. The transmitter sub-system controller (107) is programmed to not only match the static pressure map against stored templates but also to interpret dynamic pressure changes. An "enrollment" command is generated by a unique pressure sequence, such as a "light tap," followed by a "medium tap," followed by a "firm, prolonged press." This provides a multi-dimensional input (X, Y, pressure, time) that is more difficult to replicate than simple presence detection. The controller's firmware utilizes a pressure-thresholding algorithm to differentiate between light, medium, and firm presses, mapping these sequences to specific instructions in a command look-up table stored in ROM (1006).

• Mermaid Diagram:

  sequenceDiagram
      participant User
      participant PiezoresistiveSensor as Piezoresistive Sensor (121)
      participant Controller as Controller (107)
      participant Database as User DB (105)
  
      User->>PiezoresistiveSensor: Executes pressure sequence (tap-tap-press)
      PiezoresistiveSensor->>Controller: Transmits raw pressure/time data stream
      Controller->>Controller: Analyze pressure thresholds and timing
      alt Is Enrollment Command?
          Controller->>Controller: Map sequence to "Enter Enrollment Mode" instruction
          Controller->>User: Signal enrollment mode (e.g., LED feedback)
          User->>PiezoresistiveSensor: Presents new biometric for enrollment
          PiezoresistiveSensor->>Controller: Capture new biometric pressure map
          Controller->>Database: Store new biometric template
      else Is Authentication Request?
          Controller->>Database: Request template matching
          Database-->>Controller: Return Match/No-Match result
      end
  

Derivative 1.2: System with Hermetically Sealed Housing and Sapphire Sensor Surface

• Enabling Description: The transmitter sub-system (116) is housed in a unibody chassis machined from a Ti-6Al-4V titanium alloy, providing high strength and corrosion resistance for industrial or marine environments. The housing is hermetically sealed to an IP69K rating. All power is supplied via an internal inductive charging coil, eliminating physical ports. The biometric sensor (121) is an optical sensor, but its external surface is a synthetic sapphire lens, providing a hardness of 9 on the Mohs scale for extreme scratch resistance. The "enrollment" command (e.g., a sequence of three taps within two seconds) is detected through the sapphire lens. This combination is designed for environments where the device is exposed to chemicals, abrasives, and high-pressure washing.

• Mermaid Diagram:

  graph TD
      A[User presents finger] --> B{Sapphire Lens};
      B --> C[Optical Sensor Module];
      C --> D[Controller (107)];
      D -- Biometric Data --> E{Matching Logic};
      E -- Stored Templates --> F[User DB (105)];
      D -- Tap/Hold Sequence --> G{Command Interpreter};
      G -- Instruction --> H[Enrollment/Admin Function];
      H -- Write --> F;
      I[Inductive Charging Coil] --> J[Power Management IC];
      J --> D;
  
      subgraph Hermetically Sealed Ti-6Al-4V Housing
          B;C;D;E;F;G;H;I;J
      end
  

---

Axis 2: Operational Parameter Expansion

Derivative 2.1: Cryogenic Environment Access Control

• Enabling Description: The system is designed for controlling access to cryogenic storage facilities (e.g., liquid nitrogen freezers) operating at temperatures down to -196°C. The transmitter sub-system controller (107) and memory (1006) are implemented using radiation-hardened silicon-on-insulator (SOI) components rated for extreme cold. The biometric sensor is an ultrasonic scanner, as capacitive sensors are unreliable at such temperatures. The system's firmware includes a temperature compensation algorithm. The database (105) stores multiple biometric templates for each user, captured at various temperatures, to account for changes in skin elasticity and blood flow. The enrollment command (a specific tap/hold sequence) must be held for a longer duration, as configured in the system's parameters, to compensate for user difficulty in manipulating the sensor with insulated gloves.

• Mermaid Diagram:

  stateDiagram-v2
      [*] --> Idle
      Idle --> Reading: Finger Detected
      Reading --> Processing: Read Complete
      Processing --> Authenticated: Match Found
      Processing --> Idle: No Match
      Authenticated --> Unlocked: Send Access Signal
      Unlocked --> Idle: Timeout
  
      Idle --> Admin_Listen: Admin Sequence Start (e.g., long press)
      Admin_Listen --> Admin_Listen: Tap received
      Admin_Listen --> Enrollment_Mode: Correct Sequence
      Admin_Listen --> Idle: Sequence Timeout/Incorrect
      Enrollment_Mode --> Idle: Enrollment Complete
      Enrollment_Mode: Temp-Compensated Enrollment Protocol Active
  

---

Axis 3: Cross-Domain Application

Derivative 3.1: AgTech Vehicle Immobilization and Authorization

• Enabling Description: The system is integrated into the control panel of agricultural machinery like combines and tractors. The transmitter sub-system (116) is a ruggedized module connected to the vehicle's CAN bus. The biometric sensor (121) is embedded in the ignition switch or joystick. A farm manager enrolls operators by placing the system in enrollment mode via a specific sequence (e.g., five rapid taps on the sensor). The "accessibility attribute" stored in the database (105) is a multi-field record containing not only the user's biometric template but also a bitmask indicating which specific implements (e.g., sprayer, harvester head, seeder) they are authorized to operate. Upon successful authentication, the controller (107) sends a command via the CAN bus to the vehicle's ECU to disengage the immobilizer and enable control for the authorized implements.

• Mermaid Diagram:

  graph LR
      subgraph CombineHarvester
          A[Operator] --> B(Biometric Sensor on Joystick);
          B --> C{Transmitter Module (116)};
          C --> D{User & Permissions DB (105)};
          C --CAN Bus Signal--> E[Vehicle ECU];
          E --> F[Immobilizer];
          E --> G[Implement Controller];
      end
  
      subgraph EnrollmentProcess
          H[Farm Manager] -- 5 Taps --> B;
          C --Enters Admin Mode--> C;
          C --Prompts Manager--> I(Manager authenticates);
          C --Ready to Enroll--> C;
          A --Presents Finger--> B;
          C --Stores Template & Permissions--> D;
      end
  

Derivative 3.2: Smart Textile for Sterile Environment Access Control

• Enabling Description: The entire transmitter sub-system is implemented on a flexible, washable electronic textile platform. The biometric sensor consists of conductive threads woven into a capacitive grid at the cuff of a lab coat or cleanroom garment. The controller and a thin-film battery are encapsulated in a flexible silicone pod integrated into the garment's seam. To enroll a user to the garment, an administrator uses a master NFC device to put the garment into pairing mode. The new user then performs a "rub-and-hold" gesture on the textile sensor, which the controller recognizes as the enrollment command. Authentication for access to a secure lab or electronic notebook is performed by a simple touch of the cuff sensor. The system can transmit a "duress" attribute if integrated physiological sensors in the garment detect a sudden spike in heart rate combined with a valid authentication.

• Mermaid Diagram:

  flowchart TD
      subgraph Garment [Smart Lab Coat]
          A[Conductive Thread Sensor]
          B[Flexible Controller & NFC]
          C[Thin-Film Battery]
      end
  
      subgraph Enrollment
          D[Admin NFC Device] --Tap--> B;
          B --Enters Enrollment Mode--> B;
          E[New User] --Rub-and-Hold Gesture--> A;
          A --Signal--> B;
          B --Stores Template--> F[On-Garment Secure Memory];
      end
  
      subgraph Operation
          E --Touches Cuff--> A;
          A --Signal--> B;
          B --Authenticate--> F;
          B --Wireless Signal (e.g., BLE)--> G[Lab Door/PC Receiver];
      end
  

---

Axis 4: Integration with Emerging Tech

Derivative 4.1: AI-Driven Behavioral Biometric Enrollment

• Enabling Description: This derivative moves beyond static fingerprint matching. The controller (107) incorporates a lightweight AI inference engine (e.g., TensorFlow Lite). The "biometric signal" is now a combination of the fingerprint and the behavioral characteristic of the press itself—pressure, angle of approach, and duration, captured by a force-sensitive sensor array. The enrollment process, initiated by a standard tap/hold sequence, requires the user to interact with the sensor 5-10 times. The AI model builds a composite template of both the physical print and the behavioral "press signature." During authentication, the AI checks for both. This can detect a "duress" situation if a user's print is correct but their press signature deviates significantly from the norm, indicating coercion.

• Mermaid Diagram:

  classDiagram
    class Controller {
      +TensorFlowLite_Engine
      +processBiometricSignal()
      +mapSignalToInstruction()
    }
    class BiometricTemplate {
      +staticFingerprintData
      +behavioralPressSignature
    }
    class ForceSensitiveSensor {
      +readFingerprint()
      +readPressureCurve()
      +readAngle()
    }
    Controller "1" -- "1" BiometricTemplate : Manages
    Controller "1" -- "1" ForceSensitiveSensor : Reads
  

Derivative 4.2: Blockchain-Based Access Control Ledger

• Enabling Description: The system is integrated with a private blockchain for immutable access logs and decentralized identity management. The transmitter sub-system (116), upon a successful biometric match, does not store a simple "access" attribute. Instead, it holds the user's private key in its secure element. The enrollment process (via sensor gestures) authorizes the controller to generate a new key pair and create a "newUser" transaction on the blockchain, binding the public key to a hash of the user's biometric template. To grant access, the receiver sub-system (117) presents a challenge (a nonce). The transmitter sub-system signs the nonce with the user's private key, creating a signature. The receiver verifies this signature against the user's public key on the blockchain and checks their permissions via a smart contract.

• Mermaid Diagram:

  sequenceDiagram
      participant Fob as Transmitter Fob (116)
      participant Lock as Receiver/Lock (117)
      participant Blockchain
  
      Fob->>Lock: Request Access (sends user public key)
      Lock->>Lock: Generate Challenge (Nonce)
      Lock->>Fob: Send Challenge
      Fob->>Fob: User authenticates via Biometrics
      Fob->>Fob: Sign Challenge with Private Key
      Fob->>Lock: Return Signed Challenge
      Lock->>Blockchain: Verify Signature and Permissions(PublicKey, Signature, Nonce)
      Blockchain-->>Lock: Verification Result (Access/Deny)
      alt Access Granted
          Lock->>Lock: Activate Controlled Item (e.g., Unlock Door)
      end
  

---

Axis 5: The "Inverse" or Failure Mode

Derivative 5.1: Duress-Triggered "Honey-pot" Access Mode

• Enabling Description: A specific finger (e.g., the little finger), when enrolled, is flagged with a "duress" attribute in the database (105). The enrollment process for this is a unique gesture, e.g., a long press followed by two quick taps. When this duress finger is used for authentication, the system provides two outputs. First, the transmitter sends a standard "access granted" signal using the normal rolling code to the primary receiver (109), which opens the door. Simultaneously, it uses a secondary, low-power transmitter (e.g., LoRaWAN) to send an encrypted, high-priority alert packet to a separate security monitoring system. If the controlled item is a computer, authenticating with the duress finger logs the user into a sandboxed desktop environment with no network access to sensitive shares, appearing normal to an observer but protecting critical data.

• Mermaid Diagram:

  flowchart TD
      A[User presents "Duress" finger] --> B{Biometric Sensor};
      B --> C{Controller};
      C --> D{DB Match (Duress Flag Detected)};
      D --> E[Transmit 'Access' signal via Rolling Code];
      D --> F[Transmit 'Duress Alert' via LoRaWAN];
      E --> G[Primary Receiver -> Unlock Door];
      F --> H[Security Center Receiver -> Silent Alarm];
  

---

Combination Prior Art Scenarios

1. FIDO2/WebAuthn Integration: The transmitter sub-system is a FIDO2-compliant security key. The biometric sensor authenticates the user for passwordless login. The administrative command gesture (e.g., a triple-tap on the sensor) is used to broadcast a Bluetooth Low Energy (BLE) advertisement signal, putting the key into "pairing mode" to be registered with a new host computer or service provider. This eliminates the need for a separate pairing button, using the sensor for a standards-based administrative function.

2. MQTT for Legacy System Integration: The receiver sub-system (117) acts as an MQTT client. It subscribes to a specific topic on an MQTT broker (e.g., access/door/1/command). The transmitter fob (116) connects to the same network (e.g., via WiFi) and, after successful biometric authentication, publishes a signed JSON payload to that topic. A separate hardware gateway subscribes to the topic, validates the payload, and translates it into a dry-contact relay closure or a Wiegand signal for a legacy door controller. The entire communication is secured by TLS and managed by the open-source MQTT protocol.

3. RISC-V Microcontroller with Custom Gesture-Decoding Instruction: The transmitter controller (107) is implemented using a low-power, 32-bit core based on the open-source RISC-V ISA (e.g., RV32IMC). A custom instruction, bsense.gesture, is added to the ISA. This instruction takes a memory address pointing to a stream of time-stamped sensor events as input. When executed, it uses dedicated hardware logic to parse the stream and returns a value corresponding to a recognized gesture (e.g., 0x01 for single tap, 0x02 for double tap, 0x10 for long press). This offloads the complex timing logic from software, allowing the main processor to remain in a deep-sleep state until a complete gesture is decoded, drastically reducing power consumption.