Optisonics HEC Corporation Trademarks
PRODUCER
Filed: December 10, 1976
CASSETTE TAPE SYNCHRONIZER FOR SYNCHRONIZING SOUND WITH PHOTOGRAPHIC SLIDE PROJECTORS
Owned by: Optisonics HEC Corporation
Serial Number: 73109264
SOUND-O-MATIC
Filed: August 31, 1977
TAPE CASSETTE PICTURE SLIDE SYNCHRONIZERS SYNCHRONIZING SLIDE PROJECTIONS WITH AUDIO SOUNDS
Owned by: Optisonics HEC Corporation
Serial Number: 73139518
