Encryptawave Technologies v. Sharp Corp. — Dismissed With Prejudice After 209 Days
Encryptawave Technologies LLC asserted wireless encryption patent US7233664B2 against Sharp Corp. across more than 140 named products — including Smart TVs, AQUOS Boards, multifunction printers, and notebook computers — in the Eastern District of Texas. The plaintiff voluntarily dismissed the action with prejudice just 209 days after filing, with each party bearing its own costs.
Encryption patent assertion against Sharp ends at plaintiff’s own hand
On 29 March 2024, Encryptawave Technologies LLC filed suit against Sharp Corp. in the Eastern District of Texas (Case No. 4:24-cv-00274), asserting infringement of US7233664B2 — a patent covering wireless data encryption and secure communication methods. The complaint targeted an exceptionally broad product range: Sharp Smart TVs (AQUOS 4T-C and LC series), AQUOS interactive display boards, multifunction printers and copiers (MX and MFC series), projectors (NEC-branded NP series), and Portégé, Satellite Pro, and Tecra notebook computers, totalling over 140 distinct model numbers.
On 24 October 2024 — just 209 days after filing — Encryptawave filed a Notice of Voluntary Dismissal With Prejudice pursuant to Federal Rule of Civil Procedure 41(a)(1). Because Sharp had not yet served an answer or motion for summary judgment, the dismissal was self-executing and required no court order. The with-prejudice designation is legally significant: Encryptawave cannot re-file the same claims against Sharp on this patent, effectively releasing Sharp from further litigation exposure on US7233664B2 for the accused products.
The speed of resolution — roughly seven months, well before any scheduling order milestones would typically be reached — is consistent with a negotiated resolution, a licensing agreement, or an assessment that the litigation was unlikely to succeed on the merits. The public record does not disclose whether any financial consideration changed hands. The own-costs provision suggests neither side extracted a clear concession on fees, though this is standard in pre-answer voluntary dismissals and does not confirm or rule out a confidential settlement.
Filing to Voluntary dismissal in 209 days
209 days — resolved well before the typical E.D. Texas trial schedule of 18–24 months
Voluntary dismissal with prejudice: what the Rule 41 exit means for both parties
Rule 41(a)(1) allows unilateral exit before answer is served
Federal Rule of Civil Procedure 41(a)(1) permits a plaintiff to dismiss an action without a court order by filing a notice of dismissal at any time before the defendant serves an answer or a motion for summary judgment. Because Sharp had not yet answered, Encryptawave could — and did — dismiss unilaterally. The ‘with prejudice’ election was the plaintiff’s own choice; Rule 41(a)(1) defaults to without prejudice unless the plaintiff specifies otherwise.
Self-executing — no judge signature required‘With prejudice’ bars Encryptawave from re-filing against Sharp
A dismissal with prejudice carries the force of a final adjudication on the merits under res judicata principles. Encryptawave cannot bring the same patent claims against Sharp for the same accused products in any future action. This provides Sharp with meaningful legal certainty — the litigation risk from this plaintiff, on this patent, is extinguished. For Sharp’s IP and procurement teams, no further defensive spend on this matter should be required.
Res judicata applies — no re-filing riskEncryptawave surrenders all claims — strategy or necessity?
Electing ‘with prejudice’ is an unusual and self-limiting move for a patent assertion entity. It may reflect a confidential licensing agreement reached before Sharp formally appeared, a negative claim construction read, or a commercial decision to exit cleanly. Alternatively, it may signal that Sharp presented prior art or invalidity arguments informally that made continued litigation unattractive. The public record is silent on the precise driver, but the pre-answer timing is consistent with early-stage negotiation resolving the dispute.
No merits ruling — strategic motivation unclearUS7233664B2 remains live — exposure persists for other manufacturers
The dismissal against Sharp does not invalidate or limit US7233664B2. The patent remains in force and Encryptawave retains the ability to assert it against other manufacturers of connected TVs, interactive displays, MFPs, and network-capable devices. Given the breadth of the accused product categories — spanning consumer electronics, commercial display, and document imaging — competitors operating in these spaces should assess their own exposure to this wireless encryption patent.
Patent survives — third-party risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Encryptawave Technologies, LLC | Company | NPE asserting wireless encryption technology — holder of US7233664B2Search in Eureka ↗ |
| Defendant | Sharp, Corp. | Company | Sharp Corp. — multinational electronics manufacturer of TVs, displays, printers, and laptopsSearch in Eureka ↗ |
| Plaintiff counsel | David R. Bennett, Esq., | Attorney | Counsel for Encryptawave Technologies, LLCSearch in Eureka ↗ |
| Plaintiff law firm | David R. Bennett | Law Firm | Representing Encryptawave Technologies, LLCSearch in Eureka ↗ |
| Presiding judge | Judge Sean D. Jordan | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1) explicitly and elects ‘with prejudice’ — a combination that is self-executing and irrevocable. No court order was required because Sharp had not yet answered. The ‘each party bears its own costs’ clause is standard in pre-answer exits and does not imply a merits finding. For Sharp, the legal effect is equivalent to a final judgment: Encryptawave is barred from re-asserting these claims. The absence of any invalidity or non-infringement ruling means US7233664B2 itself is unaffected.
US7233664B2 — Wireless Data Encryption and Secure Communication Technology
US7233664B2 (application number US10/448989) covers wireless data encryption and secure communication methods applicable to networked electronic devices. The patent was filed in the early 2000s — a period when wireless networking was rapidly expanding into consumer and commercial electronics — and its claims appear broad enough to encompass authentication and encryption processes in Wi-Fi and other wireless communication stacks embedded in modern connected devices including televisions, displays, printers, and computers.
The strategic breadth of US7233664B2 is demonstrated by the sheer diversity of Sharp products accused: consumer Smart TVs, commercial AQUOS interactive display boards, MX-series multifunction printers, NEC-branded projectors, and Toshiba-branded notebook computers. Any manufacturer whose connected devices implement wireless encryption protocols — whether for network authentication, secure data transmission, or encrypted device communication — should assess their exposure. The patent’s scope, combined with Encryptawave’s demonstrated willingness to file in E.D. Texas, makes it a live risk for the broader consumer electronics and commercial display sectors.
Should you run an FTO analysis against US7233664B2?
If your organisation designs, manufactures, or imports connected consumer electronics, commercial interactive displays, networked multifunction printers, or wireless-capable computing devices into the US market, US7233664B2 warrants attention. This case demonstrates that Encryptawave is actively asserting this patent across a wide range of product categories. The with-prejudice dismissal against Sharp does not limit the patent’s enforceability against other parties — your products may fall within the same claim scope that drove this filing.
PatSnap Eureka’s FTO Search Agent can map the claims of US7233664B2 against your specific product architectures, identify prior art that may support invalidity arguments, and flag related continuations or family members. Eureka’s litigation monitoring tool can also alert you if Encryptawave files against competitors in your product category, giving your IP team early-warning intelligence to prepare a proactive response before a complaint lands.
Run a freedom-to-operate analysis on US7233664B2 to assess your product’s exposure
Run FTO in Eureka →Similar wireless encryption patent cases in E.D. Texas
Cases involving wireless encryption and secure communication patents asserted by NPEs in the Eastern District of Texas against consumer electronics and commercial device manufacturers.
What this case signals for the wireless encryption IP landscape
A pre-answer voluntary dismissal with prejudice in E.D. Texas typically signals something happened behind closed doors.
Pre-answer dismissals often conceal licensing outcomes
When a plaintiff dismisses with prejudice before the defendant even answers, a confidential licence is the most commercially rational explanation. Sharp’s legal team likely engaged early. Companies in connected-device markets should track whether Encryptawave pursues similar actions against other OEMs — a pattern would confirm an active licensing campaign around US7233664B2.
The E.D. Texas filing choice is a deliberate pressure signal
Eastern District of Texas remains a favoured venue for NPE assertions due to plaintiff-friendly scheduling and jury dynamics. Filing here against a defendant with no obvious local operations is a calculated move. The rapid resolution suggests Sharp either settled efficiently or presented arguments strong enough to prompt withdrawal — both outcomes worth studying for defensive playbooks.
Encryptawave v Sharp — key questions answered
Encryptawave dismissed its own case with prejudice under Rule 41(a)(1), meaning it cannot re-file the same patent infringement claims against Sharp for the accused products. The dismissal carries the legal effect of a final judgment on the merits for res judicata purposes, permanently barring re-litigation of these claims between these parties.
Encryptawave asserted US7233664B2 (application no. US10/448989), a patent covering wireless data encryption and secure communication technology. The complaint targeted over 140 Sharp product models across Smart TVs, AQUOS interactive display boards, MX-series multifunction printers, NEC-branded projectors, and Toshiba-branded notebook computers.
The case was dismissed 209 days after filing, before Sharp served an answer. This pre-answer timing is consistent with an early-stage confidential licensing agreement, a commercial settlement, or an assessment that continued litigation was not viable. The public record does not disclose the specific reason. The with-prejudice election and own-costs provision are standard features of a negotiated exit but neither confirms nor rules out financial consideration.
No. A voluntary dismissal with prejudice under Rule 41(a)(1) does not constitute a merits ruling on validity or infringement. US7233664B2 remains in force and Encryptawave retains the right to assert it against other parties. No invalidity finding or claim construction was issued in this case, leaving the patent’s scope and validity legally unchanged.
Yes. E.D. Texas, and in particular the Sherman Division, remains a favoured venue for non-practising entities asserting patents against technology companies. The district’s historically plaintiff-friendly scheduling and jury pool, combined with established NPE litigation infrastructure, make it a frequent choice for patent assertion campaigns involving consumer electronics and communication technology patents.
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