Sensor360 v. Microsoft: Voluntary Dismissal in Sensor Patent Case
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📋 Case Summary
| Case Name | Sensor360, LLC v. Microsoft Corp. |
| Case Number | 6:23-cv-00807 (Fed. Cir.) |
| Court | U.S. District Court for the Western District of Texas |
| Duration | Nov 2023 – Apr 2024 142 days |
| Outcome | Plaintiff Dismissal with Prejudice |
| Patents at Issue | |
| Accused Products | Sensor apparatus and system implementations within Microsoft’s product line |
Case Overview
The Parties
⚖️ Plaintiff
A patent assertion entity (PAE) focused on sensor-related intellectual property, asserting IP rights against commercial technology providers.
🛡️ Defendant
One of the world’s largest technology conglomerates, with products spanning cloud computing, hardware, enterprise software, IoT, and sensor-integrated platforms.
The Patent at Issue
This case involved **U.S. Patent No. 8,510,076 B2** (Application No. US10/570,742), covering a sensor apparatus and system. This patent class broadly encompasses technologies that acquire, process, or transmit sensory data — a foundational layer underpinning modern IoT devices, smart hardware, and connected software platforms.
- • US 8,510,076 B2 — Sensor apparatus and system technology
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Litigation Timeline & Procedural History
Outcome
On April 15, 2024, Sensor360 filed a voluntary dismissal with prejudice pursuant to Fed. R. Civ. P. 41(a)(1)(A)(i). The dismissal was executed unilaterally by the plaintiff just 142 days after filing, before Microsoft had even filed an answer. The “with prejudice” designation permanently bars Sensor360 from re-filing the same claims against Microsoft based on the same patent and accused products.
Verdict Cause Analysis
Because the case terminated before any substantive court ruling, there is no judicial analysis of infringement, validity, or claim scope on the record. The dismissal with prejudice under Rule 41(a)(1)(A)(i) is a self-executing mechanism. The most common explanations for such early pre-answer dismissals in patent assertion cases include confidential settlements, licensing resolutions, or a plaintiff’s reassessment of claim viability.
Freedom to Operate (FTO) Analysis
This case highlights critical IP risks in sensor technology. Choose your next step:
📋 Understand This Case’s Impact
Learn about the specific risks and implications from this litigation.
- View the patent record on the USPTO Patent Center
- Monitor PAE activity in sensor technology
- Understand the litigation trends in Western District of Texas
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High Risk Area
Sensor apparatus and system implementations
1 Patent at Issue
Specific to sensor technology
Proactive FTO
Recommended for risk mitigation
✅ Key Takeaways
Voluntary dismissal with prejudice under Rule 41(a)(1)(A)(i) forecloses all future assertion of the same claims — weigh this permanent bar carefully before filing.
Search related case law →Pre-answer dismissals avoid § 285 fee-shifting exposure for defendants, reducing leverage in post-dismissal negotiations.
Explore precedents →Western District of Texas remains a strategically significant venue for sensor and IoT patent assertions.
Analyze venue trends →Monitor PAE activity around U.S. Patent No. 8,510,076 B2 and related sensor apparatus patent families for licensing trend signals.
Track patent activity →Confidential resolutions in pre-answer dismissals may not appear in public records — competitive intelligence requires docket monitoring beyond published verdicts.
Get competitive insights →Frequently Asked Questions
The case involved U.S. Patent No. 8,510,076 B2 (Application No. US10/570,742), covering sensor apparatus and system technology.
Sensor360 voluntarily dismissed the action with prejudice under Fed. R. Civ. P. 41(a)(1)(A)(i) before Microsoft filed any responsive pleading. The specific reason — whether settlement, licensing, or strategic withdrawal — was not disclosed publicly.
It reinforces that pre-answer dismissals with prejudice are a common resolution mechanism in PAE assertions against large defendants, signaling possible confidential licensing activity and highlighting the importance of early case management strategy.
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References
- PACER (Public Access to Court Electronic Records)
- USPTO Patent Center — U.S. Patent No. 8,510,076 B2
- Cornell Legal Information Institute — Fed. R. Civ. P. 41(a)(1)(A)(i)
- 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.