Winterspring Digital v. Microchip Technology: Voluntarily Dismissed in 81 Days
Winterspring Digital, LLC asserted three network-technology patents — covering 10 Gigabit Ethernet LAN signal transmission, high-speed frame tagging, and network traffic admission control — against Microchip Technology, Inc. in the Eastern District of Texas. The plaintiff filed a voluntary dismissal with prejudice just 81 days after the complaint was filed.
Three network-patent claims dropped before Microchip filed an answer
On January 13, 2023, Winterspring Digital, LLC filed a patent infringement action against Microchip Technology, Inc. in the U.S. District Court for the Eastern District of Texas (Case No. 2:23-cv-00013), presided over by Judge Rodney Gilstrap. The complaint asserted three patents: US7420975B1 (apparatus and method for transmitting 10 Gigabit Ethernet LAN signals over a transport system), US7164692B2 (method and apparatus for a high-speed frame tagger), and US7774468B1 (network traffic admission control).
The recorded basis of termination is Voluntary dismissal. The docket order, signed by Judge Gilstrap on April 4, 2023, states that the Court accepted and acknowledged Winterspring Digital's Notice of Voluntary Dismissal with Prejudice filed pursuant to Rule 41(a)(1)(A)(i), and that all pending claims and causes of action are dismissed with prejudice. All pending requests for relief not explicitly granted were denied as moot.
The case resolved in just 81 days — a notably short interval suggesting that whatever drove the filing was resolved, abandoned, or reconsidered before substantive proceedings began. The specific terms or considerations behind the plaintiff's decision to dismiss are not disclosed in the available public record.
See Complete Case & Patent Analysis →Filing to Voluntary dismissal in 81 days
81 days — well below the median time-to-resolution in E.D. Texas patent cases
US7420975B1, US7164692B2 & US7774468B1 — 10GbE, Frame Tagging & Network Traffic Control
Any R&D or product team developing 10 Gigabit Ethernet transport equipment, network switches with frame-tagging capability, or traffic admission-control systems should treat these three patents as active FTO concerns. The patents were never invalidated — this case ended on procedural grounds — and Winterspring Digital retains the right to assert them against other parties. The risk is particularly acute for semiconductor manufacturers, NIC designers, and network equipment vendors whose products touch 10GbE transport or QoS management.
Official order — verbatim text
Judge Gilstrap's April 4, 2023 order accepted Winterspring Digital's Notice of Voluntary Dismissal with Prejudice under Rule 41(a)(1)(A)(i) and expressly dismissed all pending claims with prejudice, denying all other relief as moot. Because Rule 41(a)(1)(A)(i) permits dismissal before an answer is served without court approval, no merits evaluation was conducted; the order is procedural in nature and does not speak to the validity or infringement of the three asserted patents.
Voluntarily dismissed: what the resolution means for both parties
Rule 41(a)(1)(A)(i) voluntary dismissal — no answer required
Under Rule 41(a)(1)(A)(i), a plaintiff may dismiss an action without a court order by filing a notice before the opposing party serves an answer or a motion for summary judgment. The recorded basis of termination is Voluntary dismissal. The docket order records the dismissal as with prejudice, meaning Winterspring Digital cannot refile the same claims against Microchip on these three patents. No merits determination was made by the court.
No merits rulingWith-prejudice bar forecloses refiling on these patents
Because the public docket records this as a dismissal with prejudice, Winterspring Digital is barred from bringing the same infringement claims against Microchip Technology under US7420975B1, US7164692B2, and US7774468B1 in the future. A without-prejudice dismissal would have preserved that option. The specific reasons the plaintiff chose the with-prejudice form are not disclosed in the available record.
Refiling barredMicrochip exits without an adverse merits ruling or public costs award
Microchip Technology, Inc. obtained a clean exit — no liability finding, no injunction, and no recorded costs or fee award. The with-prejudice nature of the dismissal means Microchip faces no further threat from Winterspring Digital on these specific patents. Microchip's products and those three patents are now decoupled from active litigation risk in the Eastern District of Texas.
Clean exit for defendantThree network-infrastructure patents remain in force but untested
The three asserted patents — covering 10GbE LAN signal transport, frame tagging, and network traffic admission control — were never adjudicated on validity or infringement. They remain issued and potentially enforceable against other parties in the networking and semiconductor space. Competitors and suppliers operating in the 10 Gigabit Ethernet and network-control segment should treat these patents as live enforcement risk unless and until they are invalidated or expired.
Patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Winterspring Digital, LLC | Company | /Search in Eureka ↗ |
| Defendant | Microchip Technology, Inc. | Company | /Search in Eureka ↗ |
| Plaintiff counsel | Justin Kurt Truelove | Attorney | Counsel for Winterspring Digital, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Vincent J. Rubino , III | Attorney | Counsel for Winterspring Digital, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Fabricant LLP (NY) | Law Firm | Representing Winterspring Digital, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Truelove Law Firm | Law Firm | Representing Winterspring Digital, LLCSearch in Eureka ↗ |
| Defendant counsel | Brian Christopher Banner | Attorney | Counsel for Microchip Technology, Inc.Search in Eureka ↗ |
| Defendant law firm | Slayden Grubert Beard PLLC | Law Firm | Representing Microchip Technology, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
R&D signals in the 10GbE and network-control patent space
Forward-looking IP and innovation intelligence derived from the Winterspring Digital v. Microchip Technology dispute — covering portfolio activity, technology trends, and white-space opportunities in 10 Gigabit Ethernet and network traffic management.
Winterspring Digital's assertion portfolio in high-speed networking
Winterspring Digital asserted three patents spanning 10GbE transport, frame tagging, and traffic admission control. Mapping the broader portfolio held by or associated with Winterspring Digital — including any continuations, related applications, or co-owned patents — can reveal the full scope of potential assertion activity in the managed Ethernet and high-speed networking domain.
Portfolio assertion riskFiling trends in 10GbE transport and QoS management patents
The 10 Gigabit Ethernet transport and QoS/traffic-admission-control segment has seen sustained innovation activity from semiconductor vendors, switch ASIC designers, and hyperscale infrastructure players. Tracking filing trends in this space — particularly around high-speed frame tagging and admission-control methods — can surface emerging competitive threats and identify which assignees are staking out claim territory adjacent to the asserted patents.
10GbE filing trendsMicrochip Technology's patent footprint in Ethernet and embedded networking
Microchip Technology holds a broad semiconductor patent portfolio that extends into embedded networking and connectivity. Understanding the depth of Microchip's own filings in the 10GbE, Ethernet controller, and network-management domains can reveal both defensive prior-art assets relevant to the asserted patents and Microchip's forward R&D direction in high-speed networking silicon.
Microchip networking IPAdjacent R&D white space near frame tagging and admission control
The claim boundaries of US7164692B2 and US7774468B1 around frame tagging and network traffic admission control may leave adjacent technical space — such as programmable traffic shaping in software-defined networking or time-sensitive networking (TSN) extensions — less densely claimed. Teams innovating in next-generation managed Ethernet or SDN-controlled QoS may find patentable white space near but outside the asserted claim scope.
SDN & TSN white spaceSimilar 10GbE and Ethernet patent infringement cases in E.D. Texas
Browse comparable patent infringement actions involving Ethernet, frame-tagging, and network traffic control technology filed in the Eastern District of Texas.
What this case signals for the networking and semiconductor IP landscape
An 81-day voluntary dismissal in E.D. Texas against a major semiconductor firm carries notable IP-strategy signals for the 10GbE and network-control sector.
Early voluntary dismissal suggests pre-answer resolution dynamics worth monitoring
When a plaintiff voluntarily dismisses with prejudice before the defendant files an answer, it typically signals that the dispute was resolved or abandoned early — but the specific terms are not in the public record. For companies in the 10GbE and network-control space, this pattern warrants watching: the patents remain active and could be reasserted against other defendants.
These three patents span core Ethernet and traffic-control infrastructure — FTO exposure is real
US7420975B1, US7164692B2, and US7774468B1 cover technology central to modern high-speed networking infrastructure. Any company designing or supplying 10 Gigabit Ethernet transport systems, frame-tagging hardware, or network admission-control solutions should assess whether its products fall within the claim scope of these still-valid patents before the holder pursues a new target.
Winterspring v Microchip — key questions answered
Winterspring Digital asserted three patents: US7420975B1 (apparatus and method for transmitting 10 Gigabit Ethernet LAN signals over a transport system), US7164692B2 (method and apparatus for a high-speed frame tagger), and US7774468B1 (network traffic admission control). The case was filed on January 13, 2023 in the Eastern District of Texas.
The recorded basis of termination is Voluntary dismissal. The docket order, signed by Judge Gilstrap on April 4, 2023, states that all claims are dismissed with prejudice under Rule 41(a)(1)(A)(i). A with-prejudice dismissal bars Winterspring Digital from refiling the same claims against Microchip on these three patents. No merits ruling on validity or infringement was issued. The specific terms behind the dismissal are not disclosed in the available public record.
Yes. Because the case was dismissed on procedural grounds without any adjudication of validity or infringement, all three patents retain their presumption of validity. Winterspring Digital — or any future holder — may assert them against parties other than Microchip Technology. Companies in the 10GbE, frame-tagging, and network traffic-control space should assess their FTO exposure accordingly.
The case was dismissed 81 days after filing, before Microchip filed an answer. The public record does not disclose the reasons for the early dismissal. The specific terms or considerations are not available from the publicly filed docket.
Rule 41(a)(1)(A)(i) allows a plaintiff to voluntarily dismiss an action without a court order before the defendant serves an answer or motion for summary judgment. When filed with prejudice, as in this case, the dismissal is final and bars the plaintiff from refiling the same claims against the same defendant. No merits evaluation occurs. Judge Gilstrap accepted and acknowledged the notice and ordered the case closed.
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