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Class Information
Number: 434/324
Name: Education and demonstration > Question or problem eliciting response > Image projector included in examining means
Description: Subject matter wherein the question or problem is projected by optical means from an image carrier onto a viewing screen.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7088849 |
Method and apparatus for detecting low contrast object in a diagnostic image |
Aug. 8, 2006 |
| 6751351 |
Test question response verification system |
Jun. 15, 2004 |
| 6652286 |
Teaching device |
Nov. 25, 2003 |
| 6233428 |
System and method for distribution of child care training materials and remote monitoring of child care centers |
May. 15, 2001 |
| 6171188 |
Game device for an entertainment show |
Jan. 9, 2001 |
| 6058367 |
System for matching users based upon responses to sensory stimuli |
May. 2, 2000 |
| 5716273 |
Apparatus and method for controlling educational and amusement use of a television |
Feb. 10, 1998 |
| 5002491 |
Electronic classroom system enabling interactive self-paced learning |
Mar. 26, 1991 |
| 4973254 |
Educational apparatus |
Nov. 27, 1990 |
| 4898537 |
Locating system for maps and other diagrams and displays |
Feb. 6, 1990 |
| 4552535 |
Mechanical assembly for audio-visual teaching machines |
Nov. 12, 1985 |
| 4482328 |
Audio-visual teaching machine and control system therefor |
Nov. 13, 1984 |
| 4089125 |
Color-assist teaching aid and method therefor |
May. 16, 1978 |
| 4043053 |
Educational game |
Aug. 23, 1977 |
| 4011664 |
Self-correcting answer machine |
Mar. 15, 1977 |
| 3999307 |
Teaching machine |
Dec. 28, 1976 |
| 3946503 |
Audio-visual apparatus and method of using the apparatus for obtaining computer compatible data from an individual |
Mar. 30, 1976 |
| 3932948 |
Audio-visual learning system |
Jan. 20, 1976 |
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