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

Elevator door control system

US Patent 4776433 · Granted Oct 11, 1988

Estimated economic value: $6,391,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Process and apparatus for reacting feed with a fluidized catalyst with a reducti2025
Catalyst regneration with inverted cooler2025
Digital rod position indication system and method2025
Trip unit with high-load analysis2024
Stripping of regenerated catalyst during start-up and shutdown2024
Circuit interrupter cover2024
Smart circuit interrupter accessories applied power diagnostics2024
Smart circuit interrupter accessories internal component diagnostics2024
Regeneration of a dehydrogenation catalyst slip-stream2024
Arc flash accessory module2023
Process and apparatus for indirect catalyst heating2023
Electronic trip unit with thermal capacity measurement and display2023