Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Reflection light barrier employing adjacent lenses having bordering pupils

Reflection light barrier employing adjacent lenses having bordering pupils

US Patent 4816667 · Granted Mar 28, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Displaying status of medical lines2019
Display screen with graphical user interface for displaying medical line status2018
Process and arrangement for detecting or recognizing an object2004
Device for locating objects penetrating into a region of space to be monitored2000
Light sensor for detecting an object in a certain distance1990
Electrooptical presence recognition-sensor1988