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Class Information
Number: 434/315
Name: Education and demonstration > Audio recording and visual means > Image projector > With code on image carrier for controlling operation of apparatus
Description: Subject matter wherein the visual information carrier carries a code (e.g., light or opaque area, notch, aperture, etc.) to control the operation of the devices.

Patents under this class:

Patent Number Title Of Patent Date Issued
7261612 Methods and systems for read-aloud books Aug. 28, 2007
6011949 Study support system Jan. 4, 2000
5899700 Embedded multimedia control code method and apparatus May. 4, 1999
5710834 Method and apparatus responsive to a code signal conveyed through a graphic image Jan. 20, 1998
5164865 System and method for locating information on a continuous image medium Nov. 17, 1992
4994987 Image access system providing easier access to images Feb. 19, 1991
4677604 Method for controlling access to recorded data Jun. 30, 1987
4552535 Mechanical assembly for audio-visual teaching machines Nov. 12, 1985
4005530 Audio-visual training device with selective branching Feb. 1, 1977
3968575 Teaching device Jul. 13, 1976

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