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Class Information
Number: 434/337
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 > Light detector
Description: Subject matter wherein the examining means includes a light detecting means (e.g., photocell, etc.).
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6010339 |
Toy telephone having phone number teaching system |
Jan. 4, 2000 |
| 5478240 |
Educational toy |
Dec. 26, 1995 |
| 4990093 |
Teaching and amusement apparatus |
Feb. 5, 1991 |
| 4731023 |
Teaching system using prerecorded tape |
Mar. 15, 1988 |
| 4627819 |
Teaching or amusement apparatus |
Dec. 9, 1986 |
| 4615682 |
Teaching system utilizing magnetic tape |
Oct. 7, 1986 |
| 4602907 |
Light pen controlled interactive video system |
Jul. 29, 1986 |
| 4549867 |
Electronic learning aid with random number modes |
Oct. 29, 1985 |
| 4435164 |
Didactic apparatus providing for tutelage of responses through inculcation |
Mar. 6, 1984 |
| 4403967 |
Self teaching instrument |
Sep. 13, 1983 |
| 4358278 |
Learning and matching apparatus and method |
Nov. 9, 1982 |
| 4282522 |
Display/memory/control system for forward observer source data |
Aug. 4, 1981 |
| 4259667 |
Information interchange between an intelligent operator, indicia bearing documents, and responsive apparatus |
Mar. 31, 1981 |
| 4227318 |
A quiz game with response indication for correct and incorrect answers |
Oct. 14, 1980 |
| 4166325 |
Didactic apparatus including handheld responsor means |
Sep. 4, 1979 |
| 4033050 |
Teaching machine having response dependent programming |
Jul. 5, 1977 |
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