Tillman v. Stanley Black & Decker: Socket Adapter Patents Settled With Prejudice
Independent inventor Cornelius Tillman filed suit against Stanley Black & Decker in Florida’s Middle District, asserting two patents covering a 90-degree socket adapter and modular tool bit holder system. The parties reached a settlement agreement effective May 6, 2025 — resolving the dispute in 142 days under a with-prejudice stipulation.
Individual inventor challenges a power-tool giant over hand-tool IP
On December 16, 2024, Cornelius Tillman — appearing to act as an individual patent holder — filed an infringement action against Stanley Black & Decker Corporation in the U.S. District Court for the Middle District of Florida (Case No. 6:24-cv-02286). The complaint asserted two issued U.S. patents, US11052515B2 and US11534897B2, covering a 90-degree socket adapter and a modular tool bit holder system — hand-tool innovations that overlap directly with Stanley Black & Decker’s core consumer and professional product lines.
The case closed on May 7, 2025, via a joint stipulation of dismissal with prejudice filed pursuant to Fed. R. Civ. P. 41(a)(1)(A)(ii), reflecting a settlement agreement the parties executed the previous day. The with-prejudice designation means Tillman cannot re-file the same claims against Stanley Black & Decker. Each side agreed to bear its own fees and costs, which is a common settlement term that avoids further satellite litigation over attorney fee awards under 35 U.S.C. § 285.
The 142-day resolution is notably fast for patent infringement litigation, suggesting the parties may have entered negotiations early — possibly before or shortly after initial pleadings were exchanged. The financial terms of the settlement remain confidential and are not discernible from the public docket. What remains unknown is whether the agreement involved a licence, a royalty arrangement, design-around commitments, or a simple payment. The involvement of Carlton Fields PA on the defence side signals Stanley Black & Decker engaged experienced patent litigation counsel promptly.
Filing to Dismissed with Prejudice in 142 days
142 days — resolved well below the median district court patent trial timeline of ~2.5 years
Settled with prejudice: what the Rule 41 stipulation means for both parties
Rule 41(a)(1)(A)(ii) dismissal with prejudice — a final resolution
A stipulated dismissal with prejudice under Fed. R. Civ. P. 41(a)(1)(A)(ii) requires both parties’ signatures and operates as a final adjudication on the merits. Unlike a voluntary dismissal without prejudice, this mechanism permanently bars Tillman from reasserting the same patent claims against Stanley Black & Decker. Courts treat it as a full resolution — no court approval needed, and no appeal path on the merits.
Permanent bar on re-filingTillman’s patents survive — but the claims are spent against this defendant
The dismissal with prejudice extinguishes Tillman’s infringement claims against Stanley Black & Decker specifically, not the patents themselves. US11052515B2 and US11534897B2 remain valid and enforceable against other parties. The settlement — whose financial terms are not public — may reflect a licensing arrangement or lump-sum payment. Tillman retains the right to assert these patents against other tool manufacturers.
Patents remain live vs. third partiesStanley Black & Decker achieves finality — likely at a negotiated cost
The with-prejudice dismissal gives Stanley Black & Decker certainty: Tillman cannot revive this lawsuit. The absence of a fee award (each party bears its own costs) is consistent with a negotiated exit rather than a clear-cut defence win. The speed of resolution — 142 days — suggests Stanley Black & Decker may have assessed early settlement as commercially preferable to prolonged discovery over its socket adapter product lines.
No fee award; confidential termsHand-tool IP remains a live enforcement risk across the sector
This case signals that independent inventors holding socket adapter and modular tool bit patents are willing to assert IP against major manufacturers. Because the settlement terms are confidential, competitors cannot determine the economic value placed on these patents. Other tool manufacturers whose products overlap with the 90-degree socket adapter or modular bit holder claims covered by US11052515B2 and US11534897B2 remain exposed to potential enforcement action by Tillman.
Enforcement risk persists for sectorFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Cornelius Tillman | Individual | Independent inventor — holder of US11052515B2 and US11534897B2 covering socket adapter innovationsSearch in Eureka ↗ |
| Defendant | Stanley Black & Decker Corporation | Company | Stanley Black & Decker Corporation — global manufacturer of professional and consumer power and hand toolsSearch in Eureka ↗ |
| Plaintiff counsel | Cornelius Tillman | Attorney | Counsel for Cornelius TillmanSearch in Eureka ↗ |
| Defendant counsel | Eleanor Martha Yost | Attorney | Counsel for Stanley Black & Decker CorporationSearch in Eureka ↗ |
| Defendant law firm | Carlton Fields PA | Law Firm | Representing Stanley Black & Decker CorporationSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Florida Middle District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation references a settlement agreement executed the day prior, confirming this is not a unilateral withdrawal but a bilaterally negotiated exit. The ‘each party bearing its fees and costs’ language is a standard mutual walk-away provision under § 285, indicating neither party conceded to an ‘exceptional case’ finding. The with-prejudice designation carries the weight of a final judgment for res judicata purposes, foreclosing any future re-litigation of these specific claims between these parties.
US11052515B2 & US11534897B2 — 90-degree socket adapter and modular tool bit holder
US11052515B2 and US11534897B2 are issued U.S. utility patents arising from application numbers US16/378538 and US16/858896 respectively. Both patents relate to mechanical hand-tool accessories — specifically a 90-degree socket adapter enabling torque application in confined spaces, and a modular tool bit holder system allowing interchangeable bit configurations. These represent practical innovations in the socket and driver accessory segment, an area of active commercial competition among professional and consumer tool brands.
For a company of Stanley Black & Decker’s scale — whose brands include DEWALT, Stanley, and Craftsman — socket adapter and bit holder accessories represent high-volume SKUs. Patents covering geometric or modular configurations in this space can create meaningful infringement exposure if product designs overlap with claim language. The fact that an independent inventor successfully brought this case to a settlement with prejudice suggests the patent claims were drafted with sufficient specificity to generate commercial leverage against an industry leader.
Should your product team run an FTO against US11052515B2 and US11534897B2?
Any manufacturer or retailer selling 90-degree socket adapters, right-angle drive adapters, or modular bit holder systems should consider these two patents a priority FTO target. The with-prejudice settlement against Stanley Black & Decker demonstrates Tillman’s willingness and ability to enforce — and the patents remain live against all other parties. Product teams launching new socket accessory SKUs or updating existing adapter product lines face the clearest exposure.
PatSnap Eureka’s FTO Search Agent can map your product specifications against the independent claims of US11052515B2 and US11534897B2, identify prior art that may support a validity challenge, and flag design-around opportunities. Eureka surfaces the full prosecution history and claim scope data to give your IP and R&D teams a clear, rapid read on clearance risk — without the manual hours of a traditional FTO review.
Run a freedom-to-operate analysis on US11052515B2 to assess your product’s exposure
Run FTO in Eureka →Similar patent infringement cases: hand-tool and socket adapter IP disputes
Explore comparable patent infringement actions involving hand-tool accessories and mechanical adapter innovations filed in Florida and other U.S. district courts.
What this case signals for the hand-tool and socket adapter IP landscape
A fast settlement by a global manufacturer against an individual inventor suggests these socket adapter patents carry meaningful commercial weight.
Speed of settlement signals credible infringement read
Cases that settle within 142 days rarely do so without an early assessment that the asserted patents have merit. Stanley Black & Decker’s rapid resolution — before substantial discovery — suggests its counsel evaluated the claims of US11052515B2 and US11534897B2 as carrying real infringement risk against its socket adapter product line.
With-prejudice term protects defendant; patents still threaten competitors
The with-prejudice dismissal insulates Stanley Black & Decker from re-litigation, but Tillman’s two patents are untouched and fully enforceable against other tool manufacturers. Any company selling 90-degree socket adapters or modular bit holder systems should treat this settlement as a signal to conduct FTO analysis against US11052515B2 and US11534897B2.
Tillman v Stanley — key questions answered
Tillman asserted two U.S. patents: US11052515B2 (application US16/378538) and US11534897B2 (application US16/858896). Both relate to hand-tool accessories — a 90-degree socket adapter and a modular tool bit holder system — filed in the Middle District of Florida in December 2024.
The case was dismissed with prejudice by joint stipulation under Fed. R. Civ. P. 41(a)(1)(A)(ii) following a settlement agreement the parties executed on May 6, 2025. A with-prejudice dismissal is final — Tillman cannot re-file the same patent claims against Stanley Black & Decker. The financial terms of the settlement remain confidential.
Yes. The dismissal with prejudice applies only to Tillman’s claims against Stanley Black & Decker. The two patents remain valid, issued, and enforceable against any other party. Other tool manufacturers whose products fall within the claim scope of these patents could face infringement assertions from Tillman.
The case resolved in 142 days from filing to closure — substantially faster than the typical multi-year patent trial. This speed is consistent with early settlement negotiations, possibly before formal discovery was underway. It may suggest Stanley Black & Decker assessed the infringement risk as commercially significant enough to resolve promptly rather than contest through lengthy litigation.
Stanley Black & Decker was represented by Eleanor Martha Yost through Carlton Fields PA, a firm with established IP litigation capabilities in Florida. Tillman appeared to represent himself as plaintiff agent. The early involvement of experienced defence counsel at Carlton Fields likely contributed to the swift settlement timeline.
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