Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › People and object counting system

People and object counting system

US Patent 4303851 · Granted Dec 1, 1981

Estimated economic value: $2,612,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Gas detector system and method2011
Gas discriminating gas detector system and method2003
Elevator passenger detector and door control system which masks portions of a ha1995
Distributed load journal bearing1991
Reduced noise commutator1991
Broad bandwidth interferometric gauging system1986
Method of forming laser diffraction grating for beam sampling device1984
Two-wavelength phase control system1981
Method and apparatus for adjusting the relative positioning of planar transparen1980