Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Valve lifter

Valve lifter

US Patent 5775275 · Granted Jul 7, 1998

Assignee

General Motors

Inventors

Charles M. Philo (5 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Hydraulic element assembly2000

Valve actuation assembly1996

Enlarged shaft roller lifter with retention means1993

Engine valve train module1988

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly