Picture communication apparatus
Patent 5073926 Issued on December 17, 1991. Estimated Expiration Date: 
January 12, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 12, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3617630 Interactive graphics transmission system employing an adaptive stylus for reduced bandwidth Communication system for videoconferencing Video-telephone communications system Patent #: 4893326 Inventors
AssigneeApplicationNo. 464439 filed on 01/12/1990US Classes:348/14.12, Transmission control (e.g., resolution or quality)434/336, Response of plural examinees communicated to monitor or recorder by electrical signals434/350Response of plural examinees communicated to monitor or recorder by electrical signalsExaminersPrimary: Ng, Jin F.Assistant: Woo, Stella International ClassH04N 001/42Foreign Application Priority Data1989-01-20 JPAbstractIn a two-way communication system having first and second communication terminals, a telephone apparatus at each terminal for two-way telephone service and a picture communication apparatus at each terminal for providing users with visual images of each other; the picture communication apparatus includes video cameras for generating video signals to be transmitted, display apparatus for displaying the visual images, a control apparatus for controlling transmission and reception of the video signals, and a line drawing input apparatus connected to the control apparatus for generating a line signal representing the line drawing and which is transmitted with the video signals from the control apparatus. | |
