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Class Information
Number: 434/347
Name: Education and demonstration > Question or problem eliciting response > Correctness of response indicated to examine by self-operating or examinee actuated means > Correct answer displayed on side of element opposite side displaying question or problem
Description: Subject matter wherein a question or problem is presented on one side of an element (e.g., a sheet, etc.) and the correct answer appears on the reverse side of the element.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6139326 |
Method and testing instrument for assessing skills of an individual |
Oct. 31, 2000 |
| 6024578 |
Learning play card |
Feb. 15, 2000 |
| 5895050 |
Question and answer game |
Apr. 20, 1999 |
| 5797601 |
User selective solution system and method for flashcards, puzzles, and the like |
Aug. 25, 1998 |
| 5759041 |
Mathematics teaching device |
Jun. 2, 1998 |
| 5741561 |
Interchangeable educational writing pad |
Apr. 21, 1998 |
| 5439232 |
Educational card game |
Aug. 8, 1995 |
| 5207435 |
Word game |
May. 4, 1993 |
| 5186467 |
Sports game |
Feb. 16, 1993 |
| 5018976 |
Teaching system for enhancing the learning of sets of facts |
May. 28, 1991 |
| 4943054 |
Mental game |
Jul. 24, 1990 |
| 4687203 |
Scratch and smell game |
Aug. 18, 1987 |
| 4684136 |
Combination tic-tac-toe and question and answer game |
Aug. 4, 1987 |
| 4505497 |
Multi-colored wrapper label with readable data on both sides |
Mar. 19, 1985 |
| 4498869 |
System for teaching visual discrimination of spatially oriented subject matter |
Feb. 12, 1985 |
| 4493654 |
Educational device |
Jan. 15, 1985 |
| 4363628 |
Bank training device |
Dec. 14, 1982 |
| 4345315 |
Customer satisfaction terminal |
Aug. 17, 1982 |
| 4298200 |
Tangram game assembly |
Nov. 3, 1981 |
| 4182051 |
Entertainment and/or educational device |
Jan. 8, 1980 |
| 4105202 |
Game apparatus |
Aug. 8, 1978 |
| 4053994 |
Educational device |
Oct. 18, 1977 |
| 4029320 |
Educational game apparatus and teaching system |
Jun. 14, 1977 |
| 3939578 |
Educational board game apparatus |
Feb. 24, 1976 |
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