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Class Information
Number: 434/330
Name: Education and demonstration > Question or problem eliciting response > Correctness of response indicated to examine by self-operating or examinee actuated means > Involving magnetic attraction
Description: Subject matter wherein the correctness of the examinee"s response involves the attraction of magnetic materials.

Patents under this class:

Patent Number Title Of Patent Date Issued
5954514 Talking album for photographic prints Sep. 21, 1999
5820383 Magnetic manipulatives book Oct. 13, 1998
5707240 Album with means for magnetically determining page position Jan. 13, 1998
5707238 Number and math education system Jan. 13, 1998
4893817 Musical jigsaw-type puzzle Jan. 16, 1990
4824376 Educational device Apr. 25, 1989
4609356 Rearrangeable form board with sensory feedback Sep. 2, 1986
4536160 Computer keyboard educational toy Aug. 20, 1985
4464125 Magnetic toy cart Aug. 7, 1984
4268978 Automatic sound-emitted self-learning toy May. 26, 1981
4182052 Educational toy Jan. 8, 1980
4180920 Arrangement toy for signalling proper arrangement of elements Jan. 1, 1980
4118877 Educational toy Oct. 10, 1978

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