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Class Information
Number: 434/340
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 > Part of electric circuit completed when examinee places free element in contact with another element
Description: Subject matter wherein a freely movable element (e.g., a conductive disk) causes an electric circuit to be completed if placed at a correct answer location on some element.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6755655 |
Electronic educational toy appliance and a portable memory device therefor |
Jun. 29, 2004 |
| 6739874 |
Electronic educational toy appliance teaching letters words and numbers |
May. 25, 2004 |
| 6729881 |
Electronic educational toy appliance and a portable memory device therefor |
May. 4, 2004 |
| 5906369 |
Electronic matching game apparatus including sound generating means and method of game play using the same |
May. 25, 1999 |
| 5334022 |
Auditory playing device |
Aug. 2, 1994 |
| 5330358 |
Computerized educational and entertainment device |
Jul. 19, 1994 |
| 5161977 |
School subject learning aid and tutor |
Nov. 10, 1992 |
| 5011412 |
Educational keyboard with removable keys |
Apr. 30, 1991 |
| 4968255 |
Electronic instructional apparatus |
Nov. 6, 1990 |
| 4921427 |
Educational device |
May. 1, 1990 |
| 4893817 |
Musical jigsaw-type puzzle |
Jan. 16, 1990 |
| 4863386 |
Child's learning calendar |
Sep. 5, 1989 |
| 4824376 |
Educational device |
Apr. 25, 1989 |
| 4802092 |
Electric probe used to activate correct and incorrect response areas in an instructional apparatus |
Jan. 31, 1989 |
| 4526550 |
Combination system and question and answer matching game |
Jul. 2, 1985 |
| 4525148 |
Multi-modal educational and entertainment system |
Jun. 25, 1985 |
| 4514176 |
Automatic teaching apparatus and method |
Apr. 30, 1985 |
| 4385762 |
Electronic matching and information association game |
May. 31, 1983 |
| 4348191 |
Electronic game board |
Sep. 7, 1982 |
| 4272896 |
Educational toy |
Jun. 16, 1981 |
| 4246827 |
Device for teaching music |
Jan. 27, 1981 |
| 4121355 |
Learning device |
Oct. 24, 1978 |
| 4069597 |
Question and answer game |
Jan. 24, 1978 |
| 4067121 |
Educational game |
Jan. 10, 1978 |
| 4023807 |
Electric game set |
May. 17, 1977 |
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