e-Beacon LLC v. Singlewire Software: E-VoIP Patent Case Ends in 48 Days
e-Beacon LLC asserted US8515386B2 — covering emergency services for Voice over IP telephony — against Singlewire Software in Wisconsin’s Western District. The parties stipulated to dismiss all claims with prejudice in just 48 days, with each side bearing its own costs.
A swift stipulated exit: E-VoIP patent dispute closes in 48 days
On April 17, 2025, e-Beacon LLC filed a patent infringement action against Singlewire Software, LLC in the U.S. District Court for the Western District of Wisconsin before Judge Anita Marie Boor. The asserted patent, US8515386B2, covers emergency services for Voice over IP telephony — a technology domain central to enterprise mass-notification and emergency-alerting platforms, which is Singlewire’s core business.
The case closed on June 4, 2025, just 48 days after filing. Under Federal Rule of Civil Procedure 41(a)(1)(A)(ii), both parties executed a joint stipulation of dismissal: all of e-Beacon’s infringement claims were dismissed with prejudice, barring any re-filing of the same claims. Singlewire’s counterclaims, however, were dismissed without prejudice, preserving the defendant’s right to reassert those claims in future proceedings. Each party agreed to bear its own costs and attorneys’ fees.
A resolution in under seven weeks is atypically fast for patent litigation and strongly suggests the parties reached a private agreement — whether a license, a covenant not to sue, or a walk-away — before any substantive court proceedings took place. The public record is silent on financial terms. The asymmetry between the with-prejudice dismissal of plaintiff’s claims and the without-prejudice dismissal of defendant’s counterclaims is a structurally notable feature that practitioners should flag.
Filing to Case Dismissed in 48 days
48 days — resolved well before the median district court patent case (2–3 years)
Stipulated dismissal: what the asymmetric terms mean for both parties
Rule 41(a)(1)(A)(ii) — joint stipulation of dismissal
A dismissal under FRCP 41(a)(1)(A)(ii) requires a signed stipulation from all parties who have appeared. It takes effect immediately upon filing — no court order is needed. Here, plaintiff’s infringement claims were dismissed with prejudice, meaning the court retains no jurisdiction to revisit them. This is the cleanest possible exit for the defendant on the merits of the infringement case.
No court order requiredWith-prejudice dismissal forecloses re-filing the same infringement claims
e-Beacon LLC cannot re-file the same infringement claims against Singlewire Software based on US8515386B2. A with-prejudice dismissal operates as a final adjudication on the merits for res judicata purposes. This is a significant concession by the plaintiff. Whether e-Beacon received consideration — a license fee, a lump sum, or a covenant — is not disclosed in the public record.
Claims permanently barredCounterclaims survive — Singlewire retains optionality
Singlewire’s counterclaims were dismissed without prejudice, meaning they were not adjudicated on the merits and can be reasserted in future proceedings. This asymmetry is commercially significant: Singlewire preserved the ability to pursue invalidity or other counterclaims against US8515386B2 if e-Beacon were to threaten other defendants or if circumstances change. Fish & Richardson’s involvement as defense counsel is consistent with a negotiated exit that protected Singlewire’s future position.
Counterclaims preservedSpeed and asymmetry signal a negotiated resolution
A 48-day lifecycle — from complaint to closed docket — is consistent with a pre-litigation or very-early settlement. The with-prejudice/without-prejudice split strongly suggests structured negotiation rather than a simple walk-away. For the E-VoIP and enterprise alerting sector, this outcome leaves US8515386B2 in force and un-adjudicated on validity, meaning other vendors in the mass-notification space cannot rely on this case to challenge the patent.
Patent validity unresolvedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | e-Beacon LLC | Company | Patent assertion entity — holder of US8515386B2 covering emergency VoIP servicesSearch in Eureka ↗ |
| Defendant | Singlewire Software, LLC | Company | Singlewire Software LLC — enterprise mass-notification and emergency-alerting software providerSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Rabicoff | Attorney | Counsel for e-Beacon LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing e-Beacon LLCSearch in Eureka ↗ |
| Defendant counsel | Lance E. Wyatt , Jr. | Attorney | Counsel for Singlewire Software, LLCSearch in Eureka ↗ |
| Defendant counsel | Neil Joseph McNabnay | Attorney | Counsel for Singlewire Software, LLCSearch in Eureka ↗ |
| Defendant law firm | Fish & Richardson LLP | Law Firm | Representing Singlewire Software, LLCSearch in Eureka ↗ |
| Presiding judge | Judge Anita Marie Boor | Judge | Wisconsin Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation’s asymmetric structure — plaintiff’s claims dismissed with prejudice, defendant’s counterclaims dismissed without prejudice — is the analytically significant feature of this verdict. Under Rule 41(a)(1)(A)(ii), no judicial approval was required, and the dismissal carries immediate res judicata effect against e-Beacon on these specific claims against Singlewire. The without-prejudice carve-out for counterclaims preserves Singlewire’s invalidity arguments for future use, consistent with a negotiated resolution that afforded the defendant structured protection.
US8515386B2 — Emergency Services for Voice over IP Telephony
US8515386B2, filed under application number US13/066837, protects methods and systems for delivering emergency services functionality within Voice over IP telephony environments. The patent addresses a technically specific challenge: ensuring that E-911 and analogous emergency-alerting capabilities function reliably when traditional PSTN infrastructure is replaced or supplemented by IP-based communications. This positions the patent squarely at the intersection of enterprise UC platforms and regulatory emergency-services compliance.
For vendors in the enterprise communications, mass-notification, and campus safety sectors, US8515386B2 represents a meaningful claim perimeter. Singlewire Software’s InformaCast platform — a leading mass-notification product — operates precisely in this space. The patent’s survival as an un-adjudicated, fully enforceable right means it can be asserted against any competitor whose VoIP-integrated alerting features fall within the claim scope. With no IPR on record and no invalidity ruling from this case, the patent’s validity remains unchallenged in the public domain.
Should your VoIP emergency-services product be cleared against US8515386B2?
Any organisation developing or deploying VoIP-integrated emergency alerting, E-911 routing, mass-notification, or campus safety platforms should assess their freedom-to-operate against US8515386B2. This case confirms the patent is being actively asserted. The 48-day resolution means no claim construction order or prosecution history estoppel ruling exists to narrow the claims — leaving the full scope intact and unpredictable.
PatSnap Eureka’s FTO Search Agent can map your product’s feature set against the claim language of US8515386B2, identify relevant prior art that could support an IPR petition, and surface related family members that may present parallel risk. For R&D and product teams building VoIP emergency-services functionality, running an automated FTO analysis before launch is materially lower-cost than defending a demand letter from a patent assertion entity.
Run a freedom-to-operate analysis on US8515386B2 to assess your product’s exposure
Run FTO in Eureka →Similar E-VoIP and enterprise communications patent cases in U.S. district courts
Explore related patent infringement actions involving VoIP emergency services and enterprise mass-notification technology filed in U.S. district courts.
What this case signals for the enterprise VoIP and emergency-alerting IP landscape
A swift, asymmetric dismissal over an E-VoIP patent leaves enforcement risk intact for competitors in the mass-notification space.
US8515386B2 has not been invalidated — enforcement risk remains live
Because the case ended via stipulated dismissal with no merits ruling, US8515386B2 remains fully enforceable. Any vendor offering emergency-services features over VoIP infrastructure should treat this patent as an active risk. No prior art rejection, no IPR institution, and no invalidity finding exists in the public record from this case.
The without-prejudice counterclaim carve-out is a structural red flag
Singlewire’s counterclaims — likely including invalidity — were preserved. This suggests defense counsel at Fish & Richardson secured future optionality as part of the deal. If e-Beacon re-asserts the patent against other defendants, those defendants may benefit from monitoring any future Singlewire action and its underlying counterclaim arguments.
e-Beacon v Singlewire — key questions answered
e-Beacon LLC filed a patent infringement action against Singlewire Software in the Western District of Wisconsin on April 17, 2025. The case was dismissed 48 days later via a joint stipulation under FRCP 41(a)(1)(A)(ii). Plaintiff’s claims were dismissed with prejudice; defendant’s counterclaims were dismissed without prejudice. Each party bore its own costs.
e-Beacon asserted US8515386B2, filed under application no. US13/066837. The patent covers emergency services for Voice over IP telephony (E-VoIP) — methods and systems for integrating emergency-alerting capabilities into IP-based telephony environments relevant to enterprise and campus communications platforms.
A with-prejudice dismissal operates as a final adjudication on the merits for res judicata purposes. e-Beacon LLC cannot re-file the same infringement claims against Singlewire Software based on US8515386B2. The dismissal is permanent as to those specific claims between these specific parties.
The without-prejudice treatment of counterclaims means they were not adjudicated on the merits and can be reasserted in future proceedings. This asymmetry is common in negotiated settlements where the defendant secures the right to challenge the asserted patent’s validity in any future action — providing leverage if the plaintiff pursues other defendants in the same technology space.
No. The stipulated dismissal produced no merits ruling on validity, infringement, or claim construction. US8515386B2 remains fully enforceable. No IPR petition or invalidity finding is recorded in the public docket of this case. Other vendors in the E-VoIP and enterprise mass-notification space cannot rely on this outcome to challenge the patent.
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