SZ DJI Technology v. Textron Specialized Vehicles — Dismissed With Prejudice After 405 Days
DJI, the world’s leading drone manufacturer, sued Textron Specialized Vehicles and its E-Z-GO subsidiary in Delaware over three patents covering geofencing and motor control technology. All claims were dismissed with prejudice by stipulation after 405 days, with each party bearing its own costs.
DJI’s geofencing patent assertions against Textron end at the door
On January 17, 2023, SZ DJI Technology Co. Ltd. filed suit in the District of Delaware against Textron Specialized Vehicles Inc. and E-Z-GO LLC, asserting infringement of three U.S. patents: US11482121B2 (motor control method, apparatus, and system), US11462116B2 (open platform for vehicle restricted region), and US10640224B2 (polygon-shaped vehicle restriction zones). The patents collectively cover the geofencing and motor management technology central to DJI’s autonomous vehicle and unmanned systems portfolio.
The case closed on February 26, 2024, via a joint stipulation of dismissal under Fed. R. Civ. P. 41(a)(1)(A)(ii). All three patent claims asserted by DJI were dismissed with prejudice, meaning DJI is permanently barred from re-asserting the same claims against Textron Specialized Vehicles or E-Z-GO in future litigation. Critically, the stipulation specified that each party would bear its own costs, attorneys’ fees, and expenses — a cost-neutral resolution that leaves no public financial settlement on record.
The 405-day duration suggests the parties reached resolution before substantive claim construction or trial proceedings, consistent with pre-trial settlement or licence agreement. The with-prejudice dismissal is a stronger concession than a without-prejudice exit, yet the symmetric cost bearing and lack of a damages award leaves the commercial terms entirely private. Whether a licensing arrangement underpins this dismissal cannot be confirmed from the public docket.
Filing to dismissal in 405 days
405 days — faster than the median Delaware District Court patent case
How and why the case ended: with-prejudice stipulated dismissal
Rule 41(a)(1)(A)(ii): Stipulated dismissal by both parties
A dismissal under Fed. R. Civ. P. 41(a)(1)(A)(ii) requires written consent from all parties who have appeared. This is not a unilateral withdrawal — both DJI and Textron actively agreed to end the litigation. This mechanism is most commonly used when parties have reached a private resolution, typically a settlement or licence, and wish to formally close the court proceeding without a judicial ruling on the merits.
Mutual consent requiredWith prejudice: DJI’s claims are permanently extinguished
A dismissal with prejudice operates as a final adjudication on the merits under res judicata principles. DJI cannot refile these specific patent infringement claims — under US11482121B2, US11462116B2, or US10640224B2 — against Textron Specialized Vehicles or E-Z-GO in any future proceeding. This is a meaningful concession by the plaintiff, exceeding what a simple voluntary dismissal without prejudice would require, and typically signals either a negotiated resolution or a strategic withdrawal.
No refiling permittedEach party bears own costs — symmetrical and non-punitive
The stipulation’s cost-neutrality — each side bearing its own attorneys’ fees and expenses — suggests neither party extracted a financial concession on litigation costs. In patent cases, cost awards to a prevailing party can be substantial; the absence of any award here is consistent with a negotiated exit rather than a clear win or loss. It also preserves confidentiality around any underlying settlement value, if one exists.
No cost awardPrivate resolution terms not disclosed in public record
The public docket confirms dismissal but does not reveal whether a licensing agreement, cross-licence, or financial settlement underlies the resolution. The with-prejudice nature of the dismissal and the mutual cost-bearing arrangement are consistent with a privately negotiated commercial resolution, but this cannot be confirmed. Competitors monitoring these patents should note that the patents remain active and enforceable against third parties not party to this stipulation.
Licence terms privateFull party and counsel information
| Role | Name | Typ | Detail |
|---|---|---|---|
| Kläger | SZ DJI Technology Co., Ltd. | Unternehmen | DJI — drone and autonomous vehicle technology company, holder of US11482121B2, US11462116B2, and US10640224B2Search in Eureka ↗ |
| Beklagter | Textron Specialized Vehicles, Inc. | Unternehmen | Textron Specialized Vehicles Inc. and E-Z-GO LLC — manufacturers of electric and utility vehiclesSearch in Eureka ↗ |
| Plaintiff counsel | Andrew Mark Moshos | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Bindu Ann George Palapura | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Christopher D. Mays | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | David Ellis Moore | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Ian Robert Liston | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jack B. Blumenfeld | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | James C. Yoon | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jennifer A. Ward | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jennifer C. Liu | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jordan R. Jaffe | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Michael J. Flynn | Attorney | Counsel for SZ DJI Technology Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Daniel T. Menken | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Defendant counsel | Ethan Haller Townsend | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Defendant counsel | Harrison Rich | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Defendant counsel | Jeffery Becker | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Defendant counsel | Kevin J. Meek | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Defendant counsel | Kurt M. Pankratz | Attorney | Counsel for Textron Specialized Vehicles, Inc.Search in Eureka ↗ |
| Presiding judge | Judge J. Nicholas Ranjan | Oberster Richter | Delaware District Court — Chief JudgeSearch in Eureka ↗ |
Stipulation of dismissal — official text
The stipulation cites Rule 41(a)(1)(A)(ii), confirming this was a bilateral agreement — not a unilateral plaintiff withdrawal. The with-prejudice clause is the most legally significant element: it permanently bars DJI from reasserting these three patent claims against Textron and E-Z-GO, functioning as a final judgment on the merits. The mutual cost-bearing provision is consistent with a negotiated resolution where neither party wished to signal weakness by paying the other’s fees, though the underlying commercial terms — if any — remain entirely outside the public record.
US11482121B2, US11462116B2 & US10640224B2 — DJI’s vehicle geofencing patent triad
The three asserted patents span DJI’s core geospatial vehicle restriction and motor management technology. US10640224B2 (application US16/116279) covers polygon-shaped zone definitions for vehicle restriction — a foundational geometry claim enabling flexible, non-circular geofence boundaries. US11462116B2 (US17/523847) addresses open-platform architectures for enforcing vehicle restricted regions, suggesting interoperability across device types. US11482121B2 (US17/523859) covers the motor control methods that physically enforce those restrictions — the actuation layer linking geospatial policy to vehicle behaviour.
Together, these patents cover the full stack from zone definition through policy enforcement to physical motor actuation — a strategically layered portfolio that is difficult to design around at any single layer without infringing another. For the autonomous vehicle, electric golf cart, utility vehicle, and drone sectors, this patent triad represents a meaningful IP barrier. DJI’s willingness to assert these patents against a subsidiary of Textron Inc. — a defence and industrial conglomerate — indicates confidence in the patents’ validity and commercial scope.
Should you run an FTO against US11482121B2, US11462116B2 & US10640224B2?
If your product or platform includes polygon-based geofencing, zone-restricted motor control, or open-platform vehicle restriction APIs, you should treat these three DJI patents as priority FTO targets. The risk is not limited to drone manufacturers — as this case demonstrates, DJI has asserted these patents against electric vehicle OEMs. Fleet management platforms, autonomous vehicle firmware teams, robotics developers, and golf/utility vehicle manufacturers should all assess their exposure before scaling deployments.
PatSnap Eureka’s FTO Search Agent can map your product features against the claims of US11482121B2, US11462116B2, and US10640224B2, surfacing relevant prior art and flagging claim elements that may read on your implementation. Claim monitoring alerts will notify your team if DJI files continuations or divisionals that extend this patent family — giving you advance warning before a new enforcement wave materialises.
Run a freedom-to-operate analysis on US11482121B2 to assess your product’s exposure
Run FTO in Eureka →Similar geofencing and vehicle restriction patent cases in Delaware and beyond
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What this case signals for the vehicle geofencing IP landscape
DJI’s assertive use of its geofencing patent portfolio against a major vehicle OEM has implications across autonomous mobility and electric vehicle sectors.
DJI’s geofencing patents remain live threats to other vehicle OEMs
The dismissal with prejudice only binds Textron and E-Z-GO. US11482121B2, US11462116B2, and US10640224B2 remain in force and enforceable. Any other manufacturer deploying polygon-based geofencing zones, open-platform vehicle restriction systems, or related motor control methods should treat these patents as active enforcement risks. DJI has now demonstrated willingness to litigate in Delaware.
Delaware venue signals a structured enforcement strategy by DJI
Filing in the District of Delaware — a plaintiff-friendly jurisdiction with well-established patent procedures — suggests DJI’s IP team is executing a deliberate enforcement programme, not opportunistic litigation. Companies in the autonomous vehicle, golf cart, utility vehicle, and robotics sectors with geofencing features should audit their freedom-to-operate exposure against DJI’s growing U.S. patent estate.
SZ v Textron — key questions answered
DJI asserted three patents: US11482121B2 (motor control method, apparatus, and system), US11462116B2 (open platform for vehicle restricted region), and US10640224B2 (polygon-shaped vehicle restriction zones). All three relate to geofencing and motor restriction technology used in autonomous and electric vehicles.
The case was dismissed with prejudice by joint stipulation under Fed. R. Civ. P. 41(a)(1)(A)(ii), meaning both parties agreed to end the litigation. A with-prejudice dismissal permanently bars DJI from re-asserting the same claims against Textron or E-Z-GO. The public record does not disclose whether a settlement or licence underlies the resolution.
No. The dismissal with prejudice only binds the named parties — Textron Specialized Vehicles Inc. and E-Z-GO LLC. US11482121B2, US11462116B2, and US10640224B2 remain in force and enforceable against any other party. The case does not create any public licence or dedication of the patents to the public.
The cost-neutrality clause means neither DJI nor Textron/E-Z-GO is required to pay the other’s litigation expenses. In patent cases, prevailing parties can seek substantial fee awards; the absence of any cost order here is consistent with a negotiated resolution where both sides agreed to a clean exit without financial concessions on litigation costs.
DJI was represented by Morris, Nichols, Arsht & Tunnell LLP, Potter Anderson & Corroon LLP, and Wilson Sonsini Goodrich & Rosati PC, with counsel including Jack B. Blumenfeld and James C. Yoon. Textron Specialized Vehicles and E-Z-GO were represented by McDermott Will & Emery LLP, with counsel including Kurt M. Pankratz and Kevin J. Meek.
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