Patents Assigned to Educational Electronics of California Inc.
  • Digital logic control for audio visual programs and method therefor
    Patent number: 4075668
    Abstract: The present disclosure is directed to a logic control system for maintaining sync between an audio tape program and a slide or film projector by adding a signal track to the tape on which is recorded a tape stop signal and projector frame change signal which through a digital logic control circuit synchronization between the audio and visual components is preserved irrespective of tape speed or direction.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: February 21, 1978
    Assignee: Educational Electronics of California Inc.
    Inventor: Bernard C. Keach