Davidson Instruments, Inc. sues Parker-Hannifin Corporation (NYSE: PH) alleging antitrust violations, theft of trade secrets, and copyright infringement due to fraudulent patent filings based on Davidson trade secrets and other acts.

Davidson Instruments, a world leader in the development of fiber optic pressure measurement systems for use in harsh industrial applications, alleges that Parker-Hannifin is responsible for the filing of a fraudulent patent application in 2024, other fraudulent patent filings, and other acts of misappropriation of its trade secrets. Davidson’s trade secrets can eliminate greenhouse gases emissions and also maximize fuel efficiency in jet engines and other industrial combustion turbine engines when used with advanced combustion control systems.

Davidson alleges that Parker misappropriated Davidson’s proven trade secret technology after Parker failed to develop a similar fiber optic sensing system through an initiative that it began in 2013. Davidson further alleges that Parker has been attempting to use fraudulent patent filings to control the market for innovations in this fiber optic sensing technology for use in jet engines.

Davidson believes it is entitled to damages of at least $900,000,000 and certain injunctive relief. The case is: Davidson Instruments, Inc. v. Parker-Hannifin Corporation, 2:25-cv-00520, filed on May 12, 2025, in the U.S. District Court for the Eastern District of Texas, in Marshall, Texas.

Click Here to Download the Complaint Filed in U.S. District Court for the Eastern District of Texas, in Marshall, Texas on May 12, 2025.