Missed Call LLC v. TalkDesk: Missed Call Notification Patent Dispute Closes After 1,263 Days
Missed Call LLC brought a patent infringement action against cloud contact-centre provider TalkDesk, asserting US9531872B2 covering communication apparatus for missed call indication. Filed in Delaware in June 2022, the case ran for over three years before closing in November 2025 with the basis of termination recorded as ‘Other’.
A Missed Call Patent Assertion Against a Cloud Contact-Centre Leader
Missed Call LLC filed suit against TalkDesk Inc. on June 6, 2022 in the United States District Court for the District of Delaware (Case No. 1:22-cv-00740), asserting infringement of US9531872B2. The patent, stemming from application US13/811195, covers a communication apparatus for providing an indication about a missed call and a method thereof — technology directly relevant to TalkDesk’s cloud-based contact-centre and telephony platform.
The case was presided over by Judge Colm F. Connolly and ran for approximately 1,263 days before closing on November 20, 2025. The basis of termination is recorded as ‘Other’, meaning the public docket does not clearly specify whether resolution came through settlement, consent judgment, or another procedural mechanism. Neither a trial verdict nor a publicly disclosed settlement amount appears in the available record.
A duration of over three and a half years is notable, suggesting the parties likely engaged in substantive claim construction or discovery before resolution. The ‘Other’ termination basis leaves open questions about whether any licensing agreement was reached. The absence of a fee award and the lack of a merits ruling mean the enforceability of US9531872B2 against comparable defendants remains an open question for the sector.
Filing to Other in 1263 days
1,263 days — above the median for patent cases in Delaware District Court
Case closed via ‘Other’ basis: what the termination record means for both parties
‘Other’ basis of termination: what it means in practice
When a Delaware District Court case closes with ‘Other’ as the basis of termination, it typically signals a resolution that does not fit neatly into standard categories such as voluntary dismissal, consent judgment, or jury verdict. This may include confidential settlement with stipulated dismissal, administrative closure, or a procedural resolution. The specific terms are not publicly disclosed, and no merits ruling was entered on US9531872B2.
No merits adjudicationMissed Call LLC exits without a public merits ruling
For Missed Call LLC, the ‘Other’ closure means US9531872B2 was never invalidated or found non-infringing by a court in this action. The patent’s enforceability is technically intact against future targets. However, the absence of a public infringement finding also means the patent holder cannot point to a court-affirmed win, which may affect licensing leverage in future assertion campaigns against other cloud telephony providers.
Patent enforceability preservedTalkDesk avoids a liability finding but terms remain undisclosed
TalkDesk exits the litigation without any public finding of infringement or damages award against it. If resolution involved a confidential licence or payment, those terms are shielded from public scrutiny. The lack of a court ruling on the merits means TalkDesk cannot rely on this case as precedent to block future assertions of US9531872B2 from Missed Call LLC or any successor in interest holding the patent.
No public liability findingCloud telephony sector: US9531872B2 remains a live enforcement risk
Because the case closed without invalidation or a non-infringement ruling, US9531872B2 remains available for assertion against other cloud contact-centre and telephony vendors. Competitors operating similar missed-call indication features should treat this patent as an active risk. The three-plus-year duration of this case also signals that defending against this assertion family is likely to require sustained resource commitment before resolution.
Active assertion risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Missed Call, LLC | Company | Patent assertion entity — holder of US9531872B2 covering missed call indication technologySearch in Eureka ↗ |
| Defendant | TalkDesk, Inc. | Company | TalkDesk Inc. — cloud contact-centre software and telephony platform providerSearch in Eureka ↗ |
| Plaintiff counsel | Jimmy C. Chong | Attorney | Counsel for Missed Call, LLCSearch in Eureka ↗ |
| Plaintiff counsel | William P. Ramey , III | Attorney | Counsel for Missed Call, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Chong Law Firm PA | Law Firm | Representing Missed Call, LLCSearch in Eureka ↗ |
| Defendant counsel | Elena C. Norman | Attorney | Counsel for TalkDesk, Inc.Search in Eureka ↗ |
| Defendant counsel | Robert M. Vrana | Attorney | Counsel for TalkDesk, Inc.Search in Eureka ↗ |
| Defendant law firm | Young Conaway Stargatt & Taylor, LLP | Law Firm | Representing TalkDesk, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Colm F. Connolly | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
The verdict record states only ‘Case closed’ with a basis of termination of ‘Other’, indicating no merits judgment was entered on US9531872B2’s infringement or validity. This opaque closure is consistent with a confidential negotiated resolution. Neither party can cite this proceeding as judicial authority on the patent’s scope, leaving the claim construction and validity of US9531872B2 fully open for subsequent proceedings involving other defendants or inter partes review.
US9531872B2 — Communication Apparatus for Missed Call Indication
US9531872B2, issuing from application US13/811195, protects a communication apparatus and associated method for providing an indication about a missed call. The patent sits within the telephony and unified communications domain, covering the functional logic by which a device or platform detects, records, and communicates a missed-call event to the intended recipient. The application’s filing date places it in an era of rapid transition from hardware PBX systems to software-defined telephony, giving the claims potential reach across both legacy and cloud-native implementations.
Strategically, US9531872B2 is positioned to cover a core feature present in virtually every modern communication platform — missed call notification — making it broadly applicable across cloud contact centres, UCaaS providers, mobile VoIP applications, and enterprise telephony software. The assertion against TalkDesk, a leading CCaaS vendor, suggests the patent holder views the claim scope as extending to server-side missed-call indication logic in cloud architectures, not merely handset-level features. Competitors operating similar functionality should evaluate this patent as a sector-wide risk.
Should your product team run an FTO against US9531872B2?
Any organisation building or deploying communication software that detects and reports missed calls — including CCaaS platforms, UCaaS suites, VoIP mobile apps, and enterprise PBX replacements — should consider a freedom-to-operate analysis against US9531872B2. The fact that Missed Call LLC pursued TalkDesk, one of the most prominent names in cloud contact centres, suggests the patent holder is willing to target well-funded defendants. If your product surfaces missed-call notifications to users in any form, this patent warrants scrutiny.
PatSnap Eureka’s FTO Search Agent can map the claim language of US9531872B2 against your product’s feature set, surface relevant prior art that could narrow the patent’s scope, and identify continuation or family members that may pose additional risk. Eureka can also flag whether the prosecution history contains file-wrapper estoppel that constrains the patent’s doctrine-of-equivalents reach — critical intelligence before any licensing conversation or IPR filing decision.
Run a freedom-to-operate analysis on US9531872B2 to assess your product’s exposure
Run FTO in Eureka →Similar Missed Call & Telephony Patent Cases in Delaware District Court
Explore related patent infringement actions involving communication apparatus and telephony notification patents litigated in Delaware District Court.
What this case signals for the cloud telephony IP landscape
A 1,263-day run and an opaque ‘Other’ closure suggest negotiated resolution — and leave US9531872B2 in play for future assertions.
Missed call notification patents are actively enforced against SaaS telephony
This case confirms that seemingly narrow communication-apparatus patents can be deployed against major cloud contact-centre platforms. Vendors offering missed-call features — whether in UCaaS, CCaaS, or mobile VoIP products — should audit exposure to US9531872B2 and related family members before a demand letter arrives.
Judge Connolly’s Delaware docket is a frequent venue for NPE patent actions
Delaware District Court, and Judge Connolly in particular, has become a high-volume venue for patent assertion entity cases. The court’s familiarity with patent procedure and its scheduling practices mean cases can run long even when they ultimately resolve without trial — as this 1,263-day case illustrates.
Missed v TalkDesk — key questions answered
Missed Call LLC asserted US9531872B2, issued from application US13/811195, which covers a communication apparatus for providing an indication about a missed call and a method thereof. The case was filed in Delaware District Court on June 6, 2022 and closed on November 20, 2025.
The case closed on November 20, 2025 after 1,263 days with a basis of termination recorded as ‘Other’. No trial verdict or publicly disclosed settlement terms appear in the available record. This termination basis typically suggests a negotiated resolution, potentially a confidential licence or stipulated dismissal, without a merits adjudication of US9531872B2.
Based on the available public record, yes. The case closed without any court ruling invalidating US9531872B2 or finding it non-infringed. The patent’s enforceability is technically intact. However, the absence of a public merits ruling means this case provides no judicial precedent for or against the patent’s validity or scope.
Missed Call LLC was represented by Chong Law Firm PA, with attorneys Jimmy C. Chong and William P. Ramey III on record. TalkDesk was represented by Young Conaway Stargatt & Taylor LLP, with Elena C. Norman and Robert M. Vrana listed as counsel. The case was presided over by Judge Colm F. Connolly of the Delaware District Court.
In Delaware District Court patent cases, ‘Other’ as a basis of termination indicates a resolution outside the standard categories of voluntary dismissal, consent judgment, or jury or bench verdict. It is commonly associated with confidential settlements paired with stipulated dismissals, or administrative closures. It does not indicate a court ruling on the patent’s merits, and the specific terms typically remain non-public.
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