NXP USA v. Impinj: RFID Patent Dispute Ends in Voluntary Dismissal
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📋 Case Summary
| Case Name | NXP USA, Inc. v. Impinj, Inc. |
| Case Number | 24-1121 (Fed. Cir.) |
| Court | Federal Circuit, Appeal from District Court |
| Duration | Nov 2023 – Mar 2024 136 days |
| Outcome | Voluntary Dismissal – Parties Bear Own Costs |
| Patents at Issue | |
| Accused Products | Impinj Monza® R6 Chip (Level Shifter) |
Case Overview
The Parties
⚖️ Plaintiff
A subsidiary of NXP Semiconductors N.V., a global leader in semiconductor solutions with deep roots in RFID, automotive, and embedded processing technologies. NXP holds an extensive IP portfolio.
🛡️ Defendant
A Seattle-based fabless semiconductor company widely recognized as a leading provider of RAIN RFID solutions, with its Monza® product line central to the UHF RFID ecosystem.
The Patents at Issue
This case involved six U.S. patents covering semiconductor and RFID circuit technologies, specifically related to level shifter circuits — voltage-translation components critical to low-power RFID chip design and multi-voltage domain operation. These patents are registered with the U.S. Patent and Trademark Office (USPTO).
- • US7257092B2
- • US8415769B2
- • US7795951B2
- • US7538444B2
- • US7347097B2
- • US7456489B2
Designing a similar RFID chip?
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The Verdict & Legal Analysis
Outcome
The Federal Circuit dismissed Case No. 24-1121 pursuant to Federal Rule of Appellate Procedure 42(b), the standard mechanism for voluntary dismissal by agreement of the parties. The court ordered that each side bear its own costs, a neutral allocation consistent with a negotiated resolution rather than a clear winner-loser outcome. No damages figure or injunctive relief was publicly disclosed.
Key Legal Issues
The underlying cause of action was a patent infringement action, with NXP asserting that Impinj’s Monza® R6 chip, specifically its level shifter architecture, infringed one or more claims across the six asserted patents. Level shifter circuit patents present nuanced claim construction challenges. Without a Federal Circuit opinion on the merits, the claim construction positions advanced by each party remain untested at the appellate level, preserving uncertainty for future disputes involving similar circuit designs.
Freedom to Operate (FTO) Analysis
This case highlights critical IP risks in RFID semiconductor design. Choose your next step:
📋 Understand This Case’s Impact
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- View the asserted patents and their families
- Analyze claim scope and potential design-arounds
- Identify key players in RFID IP
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High Risk Area
Level Shifter Circuits
6 Asserted Patents
In RFID semiconductor space
Design-Around Options
Available for most claims
✅ Key Takeaways
Voluntary Federal Circuit dismissal under FRAP 42(b) generates no binding precedent — district court records remain the operative legal reference.
Search related case law →Six-patent portfolio assertions in semiconductor cases significantly increase settlement leverage and defense costs.
Explore litigation strategies →Frequently Asked Questions
Six U.S. patents were asserted: US7257092B2, US8415769B2, US7795951B2, US7538444B2, US7347097B2, and US7456489B2 — covering semiconductor circuit technologies relevant to RFID chip design, including level shifter circuits.
The appeal was dismissed by agreement of both parties under Federal Rule of Appellate Procedure 42(b), with each side bearing its own costs — indicating a negotiated resolution reached during the appellate proceedings.
Without a Federal Circuit merits ruling, NXP’s patents remain unvalidated and unchallenged at the appellate level, preserving their assertion potential. RFID semiconductor companies should evaluate FTO exposure against these patents in their circuit design processes.
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References
- PACER — NXP USA, Inc. v. Impinj, Inc. (Case No. 24-1121)
- USPTO Patent Full-Text Database
- Cornell Legal Information Institute — Federal Rule of Appellate Procedure 42(b)
- PatSnap — IP Intelligence Solutions for Law Firms
This article is for informational purposes only and does not constitute legal advice. All case information is drawn from publicly available court records. For platform capabilities, visit PatSnap.