Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
FC

Frank Cathell

QSQualidyne Systems: 3 patents #1 of 4Top 25%
Chula Vista, CA: #176 of 742 inventorsTop 25%
California: #149,087 of 386,348 inventorsTop 40%
Overall (All Time): #1,667,272 of 4,157,543Top 45%
3 Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4912597 Assembly of electric impedance elements Ronnie L. Carpenter 1990-03-27
4720775 Inverter having saturating current transformer core for maintaining inverter current above minimum predetermined level 1988-01-19
4270165 Controller for d.c. current supplied by a plurality of parallel power supplies Ronnie L. Carpenter 1981-05-26