Patent №
US 4,628,496
Granted
1986-12-09
Filed 1984
Owner
DYNAMETRIC, INC., A CA CORP.
+1 more
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
06635300
The presence of persons in a space is sensed with the aid of ultrasonic pulses which are sent out into the space when echoes of such ultrasonic pulses are received. Echoes attributable to the floor or to parts of a door in the space are timed out, and a remainder of such echoes is employed for sensing persons in the space. For example, sliding or revolving doors may be controlled and operated with the aid of such ultrasonic echoes, and limited access to secured areas may be provided thereby.
AI classification
Ownership
DYNAMETRIC, INC., A CA CORP.
assignment · 42920365
VON DURPIN, INC., A CORP. OF IN.
assignment · 45420245
Assignors
LEE, CHARLES E.
On an employer assignment, the assignors are typically the inventors.