Evergreen Telemetry LLC vs. Fieldpiece Instruments: HVAC Patent Case Dismissed With Prejudice
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📋 Case Summary
| Case Name | Evergreen Telemetry LLC v. Fieldpiece Instruments Incorporated |
| Case Number | 2:24-cv-02814 |
| Court | U.S. District Court for the District of Arizona |
| Duration | Oct 2024 – Jan 2026 1 year 3 months |
| Outcome | Defendant Win — Dismissed With Prejudice |
| Patents at Issue | |
| Accused Products | Samsung Galaxy S Series Smartphones |
Case Overview
The Parties
⚖️ Plaintiff
Patent assertion entity holding intellectual property in wireless telemetry and HVAC monitoring systems.
🛡️ Defendant
Manufacturer of professional HVAC/R test and measurement equipment, known for its Job Link System.
Patents at Issue
This landmark case involved three U.S. patents covering wireless telemetry technology relevant to HVAC diagnostics. These patents were registered with the U.S. Patent and Trademark Office (USPTO).
- • U.S. Patent No. 11,441,798 B1 — Wireless telemetry and data communication systems relevant to HVAC diagnostics.
- • U.S. Patent No. 9,605,857 B2 — Earlier-generation patent addressing HVAC system monitoring methodology.
- • U.S. Patent No. 10,830,466 B2 — Continuation-family patent addressing wireless HVAC testing system architecture.
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The Verdict & Legal Analysis
Outcome
The case was dismissed with prejudice by the Arizona District Court on January 21, 2026, meaning Evergreen Telemetry is barred from re-filing the same claims against Fieldpiece on the same patents and accused products. No damages or injunctive relief were publicly recorded, making the outcome a decisive conclusion rather than a procedural pause.
Key Legal Issues
The dismissal with prejudice, a final conclusion to the litigation, means Evergreen Telemetry’s right to reassert these claims is extinguished. The outcome, without a public ruling on the merits, suggests resolution prior to a full trial, potentially driven by successful motion practice by Fieldpiece or a negotiated withdrawal by Evergreen. This outcome highlights strategic defense effectiveness in patent assertion entity (PAE) litigation. The legal issues likely revolved around claim construction of wireless telemetry patents and potential challenges to patent validity, particularly regarding software-related claims under the *Alice Corp. v. CLS Bank* precedent, which frequently impacts such patents.
Freedom to Operate (FTO) Analysis: HVAC Patent Risks
This case highlights critical IP risks in HVAC wireless instrumentation. Choose your next step:
📋 Understand This Case’s Impact
Learn about the specific risks and implications from this litigation.
- View all 60+ related patents in this technology space
- See which companies are most active in HVAC wireless patents
- Understand claim construction patterns
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High Risk Area
Wireless HVAC telemetry and diagnostic systems
60+ Related Patents
In HVAC wireless space
Design-Around Options
Available for most claims
✅ Key Takeaways
Dismissal with prejudice in patent cases forecloses future assertion on identical claims — a critical distinction when advising clients on settlement versus dismissal terms.
Search related case law →Multi-patent wireless telemetry assertions require robust claim charts addressing both hardware and software components of accused systems.
Explore precedents →Frequently Asked Questions
Three U.S. patents: No. 11,441,798 B1; No. 9,605,857 B2; and No. 10,830,466 B2 — all directed to wireless telemetry and HVAC monitoring systems.
The case was dismissed with prejudice in the Arizona District Court on January 21, 2026, after 461 days of litigation. No damages or injunctive relief were publicly recorded.
The outcome reinforces the value of early, aggressive defense by sophisticated IP counsel and highlights the risks of multi-patent assertions against well-resourced defendants in the wireless instrumentation space.
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References
- PACER Case No. 2:24-cv-02814, D. Ariz.
- USPTO Patent Search
- AddyHart LLC (Plaintiff’s Counsel)
- Newman Jones PLLC (Plaintiff’s Counsel)
- Osborn Maledon PA (Defendant’s Counsel)
- Wilson Sonsini Goodrich & Rosati LLP (Defendant’s Counsel)
- 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.