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Class Information
Number: 434/316
Name: Education and demonstration > Audio recording and visual means > Image projector > With code on audio carrier for controlling operation of apparatus
Description: Subject matter wherein the sound information carrier carries a code (e.g.., a tone of selected frequency, etc.) to control the operation of the device.

Patents under this class:

Patent Number Title Of Patent Date Issued
8538318 Apparatus and methods for an interactive electronic book system Sep. 17, 2013
6710955 Method and apparatus for converting an analog audio source into a digital format Mar. 23, 2004
6108515 Interactive responsive apparatus with visual indicia, command codes, and comprehensive memory functions Aug. 22, 2000
5888070 Electronic aid for reading practice Mar. 30, 1999
5873735 Information reproducer and information creating unit Feb. 23, 1999
5710834 Method and apparatus responsive to a code signal conveyed through a graphic image Jan. 20, 1998
5609487 Audio visual karaoke system using audio cassette Mar. 11, 1997
5234346 Educational and training simulator system and method Aug. 10, 1993
4968254 System for synchronizing the output signals from multiple media Nov. 6, 1990
4552535 Mechanical assembly for audio-visual teaching machines Nov. 12, 1985
4482328 Audio-visual teaching machine and control system therefor Nov. 13, 1984
4470675 Random access control apparatus and method for slide projector Sep. 11, 1984
4165159 Microprocessor controlled filmstrip projector Aug. 21, 1979
4005530 Audio-visual training device with selective branching Feb. 1, 1977
3984923 System and process for preschool screening of children Oct. 12, 1976
3968576 Method and apparatus of aural/visual correspondence for the improvement of reading Jul. 13, 1976
3946503 Audio-visual apparatus and method of using the apparatus for obtaining computer compatible data from an individual Mar. 30, 1976
3939579 Interactive audio-visual instruction device Feb. 24, 1976

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