Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Traffic responsive control system for automatically operated doors

Traffic responsive control system for automatically operated doors

US Patent 4272921 · Granted Jun 16, 1981

Estimated economic value: $5,800,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electronically controlled lubricating oil and fuel blending system2000
Collapsible table1987
Dual stage-dual mode low emission gas turbine combustion system1983