Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
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:

Class Number Class Name Patents
434/325 And light detector 13


Patents under this class:

Patent Number Title Of Patent Date Issued
8540520 Apparatus and method for instructional information delivery Sep. 24, 2013
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











 
 
  Recently Added Patents
Family of pain producing substances and methods to produce novel analgesic drugs
Continuous geospatial tracking system and method
Method of manufacturing nitride semiconductor and nitride semiconductor element
Gas sensor with a porous layer that detectably affects a surface lattice resonant condition of a nanoparticle array
System and method for reliable packet data transport in a computer network
System and method for combining different tablets into a pouch
Combination therapy to enhance NK cell mediated cytotoxicity
  Randomly Featured Patents
Human recognition apparatus and human recognition method
Ski binding apparatus
Use of identification codes in the handling and management of communications
Pattern cooled turbine airfoil
Process for heading pipe ends and device for implementing it
Polishing composition and polishing method using the same
Oxygen enrichment of indoor human environments
Golf club
Iron-based powder compositions containing green strengh enhancing lubricants
Method for making glass nonfogging