Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Revolving door control system

Revolving door control system

US Patent 4627193 · Granted Dec 9, 1986

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Revolving door with metal detection security2004
Anti-piggybacking: sensor system for security door to detect two individuals in 1993
Security door with improved sensor for detecting unauthorized passage1992
Security door with improved sensor for detecting unauthorized passage1991
Revolving door control system1990
Revolving door control1986