GENERAC POWER SYSTEMS, INC. et al. vs. Champion Power Equipment, Inc.

Explore the PTAB proceeding IPR2025-01457 filed by GENERAC POWER SYSTEMS, INC. et al. on 2025-10-07. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01457

Filing Date

2025-10-07

Accorded Filing Date

2025-10-07

Institution Decision Date

2026-03-17

Last Modified Date

2026-09-09

Proceeding Type

IPR

Termination Date

—

Trial Status

Trial Instituted

Parties & Counsel

Petitioner

GENERAC POWER SYSTEMS, INC. et al.

Represented By

Leach, Thomaset al

Patent Owner / Respondent

Champion Power Equipment, Inc.

Represented By

STALEY, JOSEPHet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 3700 - Mechanical Engineering & Manufacturing

Patent Information

1 Patent Involved

Respondent Application Number 16946438

Respondent Patent Number 11143145

External Links

Espacenet

Google Patents

Respondent Inventor Kendall J. Collie et al

Respondent Tech Center TC 3700 - Mechanical Engineering & Manufacturing

Address and Attorney/Agent Information

2 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Husch Blackwell LLP (Champion) - INTELLECTUAL PROPERTY DEPARTMENT

Customer Number 225753

Address 511 North Broadway, Suite 1100, MILWAUKEE, WI, 53202, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
38368	Timothy Ziolkowski	262-268-8100
71459	Jacob Fritz	262-268-8100

Proceeding Documents

191

Patent Owners Objections to Evidence OTHER

2026-09-09 FILING PARTY: PATENT OWNER

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1093

USPTO, Cooperative Patent Classification: F02D (2026) Exhibit

2026-09-01 FILING PARTY: PETITIONER

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1104

U.S. Patent No. 8,360,027 Exhibit

2026-09-01 FILING PARTY: PETITIONER

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1117

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Generac Model DF3500E et al Exhibit

2026-09-01 FILING PARTY: PETITIONER

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1101

File History for U.S. Patent No. 11,306,667 (“the ’667 File History”) Exhibit

2026-09-01 FILING PARTY: PETITIONER

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GENERAC POWER SYSTEMS, INC. et al. vs. Champion Power Equipment, Inc.

Proceeding Overview

Parties & Counsel

Petitioner

GENERAC POWER SYSTEMS, INC. et al.

Represented By

Patent Owner / Respondent

Champion Power Equipment, Inc.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Patent Owners Objections to Evidence OTHER

USPTO, Cooperative Patent Classification: F02D (2026) Exhibit

U.S. Patent No. 8,360,027 Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Generac Model DF3500E et al Exhibit

File History for U.S. Patent No. 11,306,667 (“the ’667 File History”) Exhibit

U.S. Patent No. 5,504,417 (“Kern”) Exhibit

2CV Technical Specifications, Citroenet, https://www.citroenet.org.uk/passenger-cars/michelin/2cv/technical.html (last visited Aug. 31, 2026) Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11, 143,145 as Asserted Against Harbor Freight Model 70476, Exhibit

U.S. Patent No. 4,691,668 (“West”) Exhibit

U.S. Patent No. 6,591,817 (“Deutsch”) Exhibit

Kohler CV17-750 Service Manual Exhibit

REPLY TO PATENT OWNER RESPONSE IN INTER PARTES REVIEW OF U.S. PATENT NO. 11,143,145 REPLYTOOPP

Propane - Thermophysical properties, The Engineering Toolbox, https://www.engineeringtoolbox.com/propane-d_1423.html#gsc.tab=0 (last visited Aug. 31, 2026) Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Harbor Freight Model 70143 Exhibit

U.S. Patent Publication No. 2007/0137591 (“Sugimoto”) Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Firman Model WH02942 et al., Exhibit

Deposition Transcript of William Singhose, Taken on August 4, 2026 Exhibit

U.S. Patent No. 11,143,120 (the “’120 Patent”) Exhibit

U.S. Patent No. 5,816,224 (“Welsh”) Exhibit

Operator’s Manual for Champion Model 201508 Exhibit

Diagram Of The Ford Model T Magneto And Transmission, Published In Ford Times, October 1910, The Henry Ford, https://www.thehenryford.org/collections/explore/artifact/88714?AssetId=THF115213 (last visited Aug. 31, 2026). Exhibit

U.S. Patent Publication No. 2011/0017168 (“Gilpatrick”) Exhibit

Propane - Vapor Pressure vs. Temperature, The Engineering ToolBox, https://www.engineeringtoolbox.com/propane-vapor-pressure-d_1020.html#gsc.tab=0 (last visited Aug. 31, 2026). Exhibit

U.S. Patent Application No. 61/640,603 (“Collie”) Exhibit

Robert Bosch GmbH, Basic principles, Physics, in Electronic Automotive Handbook (2002) (ebook) Exhibit

Kubota DF752-E2 Workshop Manual Exhibit

Ian H. Bell et al., Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and the Open-Source Thermophysical Property Library CoolProp, 53 Indus. & Eng’g Chem. Res. 2498 (2014) Exhibit

U.S. Patent Publication No. 2014/0238340 (“Dunn”) Exhibit

Leigh Jenison, LinkedIn, https://www.linkedin.com/in/leigh-jenison-3a032b6/ (last visited Aug. 18, 2026) Exhibit

U.S. Patent No. 6,857,515 (“Barron”) Exhibit

U.S. Patent No. 10,697,398 (the “’398 Patent”) Exhibit

Blackmer, LPG Autogas Handbook (2015) Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Generac Model PM4500DF et al Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 10,221,780 as Asserted Against Firman Model WH02942 et al Exhibit

U.S. Patent No. 7,669,572 (“Jury”) Exhibit

Declaration of Dr. Madhi Shahbakhti, dated September 1, 2026 Exhibit

Champion’s Infringement Contentions for U.S. Patent No. 11,143,145 as Asserted Against Firman Model H05751 et al. Exhibit

How Cars Started Back in the Early Days, Car and Driver (Dec. 7, 2016) https://www.caranddriver.com/features/g15376936/how-cars-started/. Exhibit

3600 RPM 4-stroke 1000cc 30 Hp 2V92FE Electric Vertical Shaft Diesel Engine, AliExpress, https://www.aliexpress.us/item/3256810014256010.html (last visited Aug. 31, 2026) Exhibit

Order: Granting Petitioner’s Motion for Pro Hac Vice Admission of Leighton Zhao ORDER

Petitioner's Power of Attorney NOTICE

Petitioner's Updated Mandatory Notices NOTICE

Petitioner's Motion for Admission Pro Hac Vice of Leighton Zhao MOTION

Declaration of Leighton Zhao in Support of Petitioner's Motion for Admission Pro Hac Vice Exhibit

EXPUNGED_Declaration of Leighton Zhao Exhibit

EXPUNGED_PETITIONER’S MOTION FOR ADMISSION PRO HAC VICE OF LEIGHTON ZHAO UNDER 37 C.F.R. §42.10(C) MOTION

PETITIONER’S NOTICE OF DEPOSITION OF DR. WILLIAM SINGHOSE NOTICE

Patent Owners Updated Mandatory Notices NOTICE

Order: Granting Patent Owners Motions for Withdrawal of Counsel 37 C.F.R. sec. 42.10 ORDER

PETITIONER’S OBJECTIONS TO EVIDENCE UNDER 37 C.F.R. § 42.64 OTHER

Ex. 3003 Granting Leave to File Motion to Withdraw Counsel Exhibit

Patent Owners Unopposed Motion to Withdraw Counsel MOTION

US3465740 Exhibit

US5197910 Exhibit

US20120104008 (DeNardo) Exhibit

US Pub No. 20110100335A1 (Parlatore) Exhibit

Deposition Transcript of Mahdi Shahbakhti Exhibit

U.S. Patent No. 4,372,276 (Bernhardsson) Exhibit

Propane 101 Internet Archive Exhibit

Curriculum Vitae of Dr. William Singhose Exhibit

IPR2025-01271 Timothy Morse Deposition Transcript Exhibit

File History of U.S. Patent No. 10,697,398 Exhibit

Redacted Excerpts from NFPA 58 (2014) MATERIAL Exhibit

POR Declaration of William Singhose Exhibit

Patent Owners Response to Petition RESPONSE