Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Torque motor

Torque motor

US Patent D301574 · Granted Jun 13, 1989

Assignee

North American Philips

Inventors

William D. Riggs (4 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Position detecting apparatus using variable magnetic field intensity1994

Low noise DC electric motor1992

Brushless direct current motor1982

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly