Invalidity dossier
US 10537442
Bidirectional fixating intervertebral implant system
Current assignee: Moskowitz Family LLC
Added 9/24/2026, 12:28:21 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US10537442B2
Title: Bidirectional fixating intervertebral implant system
Patent number: US10537442B2 (application US15/944,117; publication US20180221173A1)
Assignee: Moskowitz Family LLC (original and current assignee). The record also lists individual assignments to Nathan C. Moskowitz from Mosheh T. Moskowitz, Pablo A. Valdivia y Alvarado, and Ahmnon D. Moskowitz, followed by assignment to Moskowitz Family LLC.
Inventors: Ahmnon D. Moskowitz; Pablo A. Valdivia y Alvarado; Mosheh T. Moskowitz; Nathan C. Moskowitz.
Key dates: Priority date 2005-04-12; filing date 2018-04-03; publication date 2020-01-21; grant date 2020-01-21. Status: Expired – Lifetime; anticipated expiration 2025-08-23.
Purpose and plain-language scope: The title describes an intervertebral implant ("intervertebral cage") that fixes in two directions ("bidirectional") using bone anchors or screws. The excerpt's "prior art keywords" list — anchor, intervertebral cage, sidewall, top wall, screw — indicates the device has a cage body with a top wall and sidewall, plus anchors/screws that secure it to bone. The CPC classifications confirm the field: spinal prostheses and special tools for implanting them (A61F2/46, A61F2/4611), spinal positioners/stabilizers (A61B17/70), and bone fasteners such as screws with bone-contacting shanks and tips (A61B17/86, A61B17/8635), along with screwdrivers/instruments (A61B17/8875, A61B17/8894). The title, abstract-adjacent keywords, and classifications together indicate a spinal fusion/spacer implant anchored to adjacent vertebral bone in two directions.
Source: https://patents.google.com/patent/[US10537442](/patent/US10537442)/en
What the excerpt does not establish: It contains no claims, no abstract, no detailed description, and no drawings text, so the exact claimed structure, anchor angles, and insertion method cannot be stated. Priority is noted as an assumption, not a legal conclusion; the excerpt also does not establish inventorship validity, claim scope, or the substance of any prior art. The "Family has litigation" indicator is a database flag only, and per instructions no litigation or validity analysis is offered here.
Generated 10/1/2026, 9:31:56 PM
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Litigation summary
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Proceedings on file (0)
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No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.