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Class Information
Number: 434/343
Name: Education and demonstration > Question or problem eliciting response > Correctness of response indicated to examine by self-operating or examinee actuated means > By means including electrical component > Size or shape of, or aperture in, free element controls indication of response correctness
Description: Subject matter wherein a freely movable element (e.g., card, etc.) has a distinctive configuration, a perforation, or other physical characteristic which is indicative of the correct response to a question or problem.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5906369 |
Electronic matching game apparatus including sound generating means and method of game play using the same |
May. 25, 1999 |
| 5634799 |
Educational apparatus |
Jun. 3, 1997 |
| 5055053 |
Computer toy |
Oct. 8, 1991 |
| 4435164 |
Didactic apparatus providing for tutelage of responses through inculcation |
Mar. 6, 1984 |
| 4280809 |
Educational toy |
Jul. 28, 1981 |
| 4085523 |
Teaching machine |
Apr. 25, 1978 |
| 4051608 |
Teaching machine |
Oct. 4, 1977 |
| 4027402 |
Novel educational toy |
Jun. 7, 1977 |
| 3977092 |
Teaching machine card |
Aug. 31, 1976 |
| 3974575 |
Teaching machine |
Aug. 17, 1976 |
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