K.Mizra LLC v. Brother Industries: Four-Patent Infringement Suit Ends in Prejudicial Dismissal
K.Mizra LLC filed suit against Brother Industries USA, Brother Industries Ltd., and Brother International Corporation in the Western District of Tennessee, asserting four patents spanning document scanning, toner replenishment, and imaging apparatus technology. After 343 days of litigation, all claims and counterclaims were dismissed with prejudice, with each side bearing its own costs.
Patent aggregator targets Brother’s imaging portfolio across four patents
On July 17, 2023, K.Mizra LLC — a patent-holding entity — filed an infringement action in the U.S. District Court for the Western District of Tennessee (Case No. 2:23-cv-02430) against three Brother entities: Brother Industries USA Inc., Brother Industries Ltd., and Brother International Corporation. The complaint, later amended, asserted four U.S. patents covering both-side document reading apparatus and methods, electric apparatus technology, enclosure enhancement systems, and toner replenishing apparatus for image forming devices.
The case concluded on June 24, 2024, when the court entered a dismissal with prejudice based on a joint stipulation filed by the parties on June 21, 2024. The dismissal extinguished all claims in K.Mizra’s Amended Complaint and all of Brother’s counterclaims simultaneously. Crucially, each side agreed to bear its own attorneys’ fees, costs, and expenses — indicating no monetary settlement component was publicly disclosed and no fee-shifting award was entered by the court.
At 343 days, the case resolved before reaching claim construction or trial, which is consistent with a negotiated resolution or licensing agreement reached out of court — though the public record is silent on any underlying commercial terms. The with-prejudice nature of the dismissal bars K.Mizra from re-asserting the same four patents against these Brother entities in future litigation, representing a meaningful concession by the plaintiff relative to a without-prejudice exit. What drove the parties to this specific outcome — whether license, design-around, or strategic retreat — remains undisclosed.
Filing to Dismissed with Prejudice in 343 days
343 days — slightly below the median federal patent case duration before trial
Dismissed with prejudice: what the stipulated exit means for both sides
Stipulated dismissal with prejudice forecloses re-litigation
A dismissal with prejudice entered on joint stipulation is a final adjudication on the merits for preclusion purposes. Unlike a without-prejudice dismissal, K.Mizra cannot refile these four patent claims against the same Brother entities in any U.S. court. The court’s order tracked the stipulation precisely, dismissing both the Amended Complaint and Brother’s counterclaims in one stroke, leaving no surviving claims between the parties.
Rule 41 — with prejudiceK.Mizra exits without public recovery — and without re-filing rights
The with-prejudice dismissal means K.Mizra permanently surrendered its right to sue these three Brother entities on the four asserted patents. No damages award, injunction, or publicly disclosed royalty appears in the record. For a patent-assertion entity, accepting a with-prejudice exit without a visible monetary return is notable — it may suggest a confidential license was reached, or that claim viability concerns made continued litigation unattractive.
No public recovery disclosedBrother secures permanent bar against these four patent claims
Brother Industries and its affiliates achieved a with-prejudice dismissal, which constitutes a durable shield: K.Mizra’s four asserted patents cannot be re-asserted against them in this configuration. Brother’s own counterclaims were also dismissed, suggesting neither party sought a declaratory judgment of invalidity to put on the public record. The mutual own-costs arrangement avoids any fee-shifting exposure under 35 U.S.C. § 285.
Permanent bar on re-assertionFour imaging patents remain active enforcement tools against other defendants
While K.Mizra is precluded from suing Brother again on these patents, the patents themselves remain in force and enforceable against third parties. Competitors in the document imaging, scanning, and toner replenishment space — particularly those who were not party to this dismissal — remain exposed. The absence of any invalidity ruling means no IPR estoppel or judicial cancellation limits future assertion campaigns by K.Mizra or any successor patent holder.
Patents remain live vs. third partiesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | K.Mizra, LLC | Company | Patent-holding entity — asserting US7840165B2 and three further imaging patentsSearch in Eureka ↗ |
| Defendant | Brother Industries USA, Inc. | Company | Brother Industries USA Inc., Brother Industries Ltd. & Brother International Corp. — global imaging and printing device manufacturerSearch in Eureka ↗ |
| Co-Defendant | Brother Industries, Ltd. | Company | Search in Eureka ↗ |
| Co-Defendant | Brother International Corporation | Company | Search in Eureka ↗ |
| Plaintiff counsel | Abigail Abide Stephens | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Angela Bubis | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Brian Boerman | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Richard M. Carter | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Robert Ronald Brunelli | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Scott Bialecki | Attorney | Counsel for K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Martin Tate Morrow & Marston PC | Law Firm | Representing K.Mizra, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Sheridan Ross, PC | Law Firm | Representing K.Mizra, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Tennessee Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s dismissal order mirrors the parties’ stipulation verbatim, confirming this was a wholly consensual exit rather than a judicial determination on the merits. The with-prejudice language is the operative term: it prevents K.Mizra from re-asserting any of the four patents against the Brother entities in future proceedings. The mutual own-costs provision, entered without a § 285 fee motion, suggests neither side characterised the other’s litigation conduct as exceptional. No claim construction record or infringement finding entered the public domain.
US7840165B2 — Both-side document reading apparatus and method
US7840165B2 (Application No. US12/262406) is directed to a both-side document reading apparatus and method — technology fundamental to duplex scanning functionality in multifunction printers and document management systems. The patent family spans complementary imaging subsystems: US9769342B2 covers electric apparatus technology; US7064874B2 addresses enclosure enhancement methods and systems; and US7499274B2 covers toner replenishing apparatus for image forming and color imaging devices. Together these patents touch core hardware and operational layers of modern MFP and printer architectures.
For a patent-holding entity like K.Mizra, a portfolio spanning duplex scanning, toner management, and enclosure systems presents a broad surface area against which virtually any major MFP manufacturer could be mapped. The strategic value lies in asserting patents across multiple product subsystems simultaneously, increasing settlement pressure. Brother’s position as a major global printer and imaging hardware company made it a commercially significant target. The absence of any invalidity judgment means these patents retain their presumption of validity and represent continued exposure for the wider imaging industry.
Should your imaging product team run an FTO against US7840165B2?
Any company developing or commercialising duplex document scanning hardware, multifunction printer architectures, toner replenishment systems, or imaging enclosure designs should treat this patent family as a priority FTO target. The four asserted patents — spanning application numbers US12/262406, US14/389593, US10/000572, and US11/450215 — collectively cover distinct layers of MFP product stacks. A gap in FTO coverage on any single patent in this cluster could expose a product line to an assertion campaign similar to the one brought against Brother.
PatSnap Eureka’s FTO Search Agent can map your specific product architecture against each of the four K.Mizra patents, identify claim elements most likely to read on your design, and surface prior art relevant to any IPR petition strategy. For R&D teams evaluating new scanner or imaging product launches, running a targeted FTO before commercial release is significantly less costly than defending a multi-patent infringement action in the Western District of Tennessee.
Run a freedom-to-operate analysis on US7840165B2 to assess your product’s exposure
Run FTO in Eureka →Similar imaging and printing patent infringement cases in U.S. district courts
Cases involving patent-assertion entities targeting MFP and imaging hardware manufacturers in U.S. district courts, including the Western District of Tennessee.
What this case signals for the imaging and printing IP landscape
A four-patent PAE action ending in a with-prejudice stipulated dismissal carries specific signals for IP teams monitoring the imaging sector.
With-prejudice exits by PAEs often mask confidential licensing activity
When a patent-assertion entity accepts a with-prejudice dismissal without any public fee award or damages record, the most commercially plausible explanation is a confidential license or settlement agreement. IP teams at imaging companies should monitor whether K.Mizra pursues similar actions against other printer and scanner manufacturers using the same four patents.
No invalidity ruling leaves the patent portfolio intact for further assertion
Brother’s counterclaims — which may have included invalidity defenses — were also dismissed. This means none of the four K.Mizra patents received a judicial invalidity determination. Companies in adjacent imaging technology spaces should treat all four patents as fully enforceable until an IPR petition or future court ruling changes their status.
K.Mizra v Brother — key questions answered
The case was dismissed with prejudice on June 24, 2024, pursuant to a joint stipulation filed by the parties on June 21, 2024. All claims in K.Mizra’s Amended Complaint and all of Brother’s counterclaims were dismissed, with each party bearing its own attorneys’ fees, costs, and expenses. No damages award or invalidity ruling entered the public record.
K.Mizra asserted four patents: US7840165B2 (both-side document reading apparatus and method), US9769342B2 (electric apparatus), US7064874B2 (method, apparatus and system for enclosure enhancement), and US7499274B2 (toner replenishing apparatus, image forming apparatus, and color image forming apparatus).
A dismissal with prejudice bars K.Mizra from re-asserting the four patents against the specific Brother entities named in this action. However, the patents themselves remain in force and enforceable against third parties not covered by the dismissal. No invalidity determination was made, so the patents retain their presumption of validity.
Yes. The court’s order expressly dismissed all counterclaims in Brother’s Answer, Affirmative Defenses, and Counterclaims (ECF No. 29) with prejudice, in addition to K.Mizra’s claims. This mutual dismissal means neither party obtained a declaratory judgment on validity or non-infringement that would benefit the wider industry.
The case was filed on July 17, 2023 and closed on June 24, 2024 — a duration of 343 days. It was heard in the U.S. District Court for the Western District of Tennessee (Case No. 2:23-cv-02430). The case resolved before reaching claim construction or trial, which is consistent with an out-of-court resolution between the parties.
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