Crystal Mountain v. Coolpad: 4-Patent Mobile Video Dispute Ends in 204 Days
Crystal Mountain Communications, LLC filed suit in the Eastern District of Texas against Coolpad Group Ltd. and Yulong Computer Telecommunication Scientific (Shenzhen) Co., alleging infringement of four patents covering portable digital video capabilities in smartphones and tablets. The case resolved in under seven months and was dismissed with prejudice — each party bearing its own costs.
Four-patent mobile video assertion resolved swiftly in E.D. Texas
On April 10, 2024, Crystal Mountain Communications, LLC filed a patent infringement action in the Eastern District of Texas (Case No. 4:24-cv-00308) before Judge Amos L. Mazzant, asserting four U.S. patents — US7266121B2, US6782367B2, US7239800B2, and US8725120B2 — against Coolpad Group Ltd. and its manufacturing affiliate Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd. The asserted patents relate to portable digital video player capabilities, and the accused products are Coolpad smartphones and tablets incorporating those features.
The case closed on October 31, 2024, after just 204 days, when the parties jointly announced to the Court that they had resolved all of Crystal Mountain’s claims. Pursuant to their request, Judge Mazzant entered an order dismissing Crystal Mountain’s claims with prejudice — meaning Crystal Mountain cannot re-assert the same patents against Coolpad on the same infringement theories in a future action. Notably, each party was ordered to bear its own attorneys’ fees, costs, and expenses, consistent with a negotiated resolution rather than a contested judgment.
The 204-day resolution is relatively swift for a four-patent Eastern District of Texas case, suggesting the parties likely reached agreement before substantial claim construction or merits briefing. The public record does not disclose whether a confidential financial settlement accompanied the dismissal, which is common in situations where a plaintiff voluntarily agrees to a with-prejudice dismissal this early in litigation. What drove the outcome — whether a licensing agreement, a cross-license, or purely strategic withdrawal — remains unknown from the public docket.
Filing to Dismissed with Prejudice in 204 days
204 days — faster than the E.D. Tex. median for multi-patent infringement actions
Dismissed with prejudice: what the joint resolution means for both parties
Dismissed with prejudice bars re-filing on the same claims
A dismissal with prejudice is a final adjudication on the merits for res judicata purposes. Crystal Mountain cannot re-assert these four patents against Coolpad for the same accused products and same infringement theories. The joint nature of the request signals mutual agreement, distinguishing this from a contested dismissal where one side may retain leverage.
Res judicata effect appliesCrystal Mountain forfeits the right to re-sue Coolpad on these patents
By agreeing to dismissal with prejudice, Crystal Mountain surrendered its ability to pursue the same infringement claims against Coolpad in any future action. The patents themselves remain in force and enforceable against other parties. The practical implication is that the resolution — whatever its undisclosed terms — was sufficiently acceptable to Crystal Mountain to justify a permanent bar against Coolpad on these specific claims.
Patents survive; Coolpad claim barredCoolpad obtains permanent protection from these specific claims
For Coolpad Group Ltd. and Yulong (Shenzhen), the with-prejudice dismissal provides certainty: Crystal Mountain cannot revive these four patent assertions against the same accused products. Each party bearing its own costs also means Coolpad avoids any fee-shifting exposure under 35 U.S.C. § 285. The swift resolution — before claim construction — likely limited Coolpad’s litigation spend materially.
No § 285 fee exposure for CoolpadEarly resolution limits precedent but signals licensing activity
The absence of any public claim construction or merits ruling means neither party obtained a judicial interpretation of the four asserted patents. This leaves the patents’ scope unresolved on the public record, which is tactically significant: Crystal Mountain can still assert the same patents against other mobile device makers. Competitors of Coolpad in the Android smartphone space should note the portfolio remains active.
Portfolio active against third partiesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Crystal Mountain Communications, LLC | Company | Patent assertion entity — holder of US7266121B2 and 3 further portable digital video patentsSearch in Eureka ↗ |
| Defendant | Coolpad Group Ltd. | Company | Coolpad Group Ltd. and Yulong (Shenzhen) — Chinese smartphone and tablet manufacturerSearch in Eureka ↗ |
| Co-Defendant | Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd. | Company | Search in Eureka ↗ |
| Plaintiff counsel | Hannah D. Price | Attorney | Counsel for Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Larry Dean Thompson , Jr. | Attorney | Counsel for Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Matthew J. Antonelli | Attorney | Counsel for Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Rehan Mohammed Safiullah | Attorney | Counsel for Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Zachariah Harrington | Attorney | Counsel for Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Antonelli, Harrington & Thompson, LLP | Law Firm | Representing Crystal Mountain Communications, LLCSearch in Eureka ↗ |
| Defendant counsel | Jason Liang Xu | Attorney | Counsel for Coolpad Group Ltd.Search in Eureka ↗ |
| Defendant law firm | Rimon PC | Law Firm | Representing Coolpad Group Ltd.Search in Eureka ↗ |
| Presiding judge | Judge Amos L. Mazzant | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal order reflects a joint, consensual resolution: both parties requested the dismissal, and the Court simply granted it. The with-prejudice designation is the operative legal effect — it functions as a final judgment for preclusion purposes without any court finding on infringement, validity, or claim scope. The symmetric fee order (each party bears its own costs) is consistent with a negotiated exit rather than capitulation by either side, and the public record is silent on any financial terms of the underlying resolution.
US7266121B2 and three further patents — portable digital video in mobile devices
The four asserted patents — US7266121B2, US6782367B2, US7239800B2, and US8725120B2 — appear to cover various aspects of integrating portable digital video player functionality into mobile communication devices such as smartphones and tablets. The application numbers suggest filing dates ranging from the early to mid-2000s, a period when the convergence of mobile telephony and multimedia playback was an active area of innovation and patent prosecution. These patents are therefore consistent with foundational portfolio assets targeting modern smartphones with video playback capabilities.
For the mobile device industry, patents protecting digital video playback integration in handsets carry broad potential reach: virtually every contemporary Android smartphone or tablet includes video player functionality. Crystal Mountain’s willingness to assert four patents simultaneously against a single defendant suggests a portfolio-level enforcement strategy. The absence of judicial claim construction means the patents’ scope remains undefined in public proceedings, preserving optionality for future assertions against other OEMs and component suppliers.
Should you run an FTO against US7266121B2 and the Crystal Mountain portfolio?
Any company designing, manufacturing, or distributing smartphones, tablets, or mobile devices incorporating digital video playback capabilities should consider an FTO analysis against this portfolio. The four asserted patents remain active and enforceable following the Coolpad dismissal, and the lack of any limiting claim construction from this case means their scope has not been judicially narrowed. The risk is particularly relevant for Android OEMs, white-label device makers, and companies sourcing hardware from ODMs in the same product categories as the accused Coolpad devices.
PatSnap Eureka’s FTO Search Agent can map each of the four Crystal Mountain patents against your product’s feature set, identify relevant prior art that may inform invalidity positions, and surface any continuation or divisional applications in the same families. Given the early 2000s priority dates across this portfolio, a family-level analysis — not just a claim chart against the granted patents — is recommended to capture any pending continuation exposure that may not yet be publicly visible.
Run a freedom-to-operate analysis on US7266121B2 to assess your product’s exposure
Run FTO in Eureka →Similar portable digital video patent cases in E.D. Texas
Browse related patent infringement actions asserting mobile media and digital video playback patents in the Eastern District of Texas against smartphone and tablet OEMs.
What this case signals for the mobile device patent licensing landscape
A four-patent assertion resolved in under seven months in E.D. Texas typically reflects either rapid licensing or a strategic decision to conserve resources on both sides.
Crystal Mountain’s portfolio remains a live enforcement risk for other OEMs
The with-prejudice dismissal binds only Coolpad. US7266121B2, US6782367B2, US7239800B2, and US8725120B2 remain enforceable against any other smartphone or tablet maker whose products incorporate portable digital video player capabilities. OEMs with similar product lines should assess their exposure promptly.
Pre-claim-construction settlements limit judicial record — but not portfolio risk
No claim construction occurred before resolution, meaning there is no court-endorsed interpretation of the four asserted patents in the public record. This preserves Crystal Mountain’s flexibility to assert broader claim readings against future defendants. For in-house IP teams, the absence of limiting constructions increases FTO uncertainty for these patents.
Crystal v Coolpad — key questions answered
Crystal Mountain Communications, LLC sued Coolpad Group Ltd. and Yulong Computer Telecommunication Scientific (Shenzhen) Co., Ltd. in the Eastern District of Texas on April 10, 2024, asserting four patents covering portable digital video capabilities in mobile devices. The case was dismissed with prejudice on October 31, 2024, after 204 days, following a joint resolution by the parties. Each party bore its own attorneys’ fees and costs.
Crystal Mountain asserted four U.S. patents: US7266121B2, US6782367B2, US7239800B2, and US8725120B2. These patents relate to portable digital video player capabilities, and the accused products were Coolpad smartphones and tablets that incorporate such functionality.
Dismissal with prejudice means Crystal Mountain is permanently barred from re-asserting the same four patents against Coolpad for the same accused products and infringement theories. It functions as a final adjudication for res judicata purposes. However, the patents remain enforceable against other defendants. Coolpad also faces no fee-shifting exposure, as each party bears its own costs under the dismissal order.
The public docket does not disclose any financial terms. The case was resolved by joint announcement and dismissed with prejudice, which is consistent with a confidential licensing or settlement agreement, but this cannot be confirmed from the available public record. The symmetric cost-bearing order — each party pays its own fees — suggests a negotiated exit rather than a unilateral withdrawal.
Yes. The with-prejudice dismissal binds only Crystal Mountain’s claims against Coolpad. US7266121B2, US6782367B2, US7239800B2, and US8725120B2 remain in force and can be asserted against other mobile device makers. No claim construction narrowing their scope was issued during this case, which preserves Crystal Mountain’s ability to assert these patents broadly against other Android OEM defendants.
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