Calvin F. Mathis

📍 Cerritos, CA: #221 of 505 inventorsTop 45%

🗺 California: #185,134 of 386,348 inventorsTop 50%

Overall (All Time): #2,224,731 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6209262	Obstruction sensing system for a gate	—	2001-04-03
5771636	Secure swing gate system that provides free access when power is off	—	1998-06-30