Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
Class Information
Number: 434/325
Name: Education and demonstration > Question or problem eliciting response > Image projector included in examining means > And light detector
Description: Subject matter wherein the examining means includes a light sensing means (e.g., photocell, etc.).










Patents under this class:

Patent Number Title Of Patent Date Issued
7949295 Automated trainee monitoring and performance evaluation system May. 24, 2011
6498921 Method and system to answer a natural-language question Dec. 24, 2002
6362812 Electronic device and display system employing the same Mar. 26, 2002
5011413 Machine-interpretable figural response testing Apr. 30, 1991
4808980 Electronic light pointer for a projection monitor Feb. 28, 1989
4378217 Terminal trainer keyboard and display apparatus for teaching keyboard operations and knowledge items Mar. 29, 1983
4122613 Operator responsive audio-visual teaching apparatus Oct. 31, 1978
4055906 Automated interrogating apparatus Nov. 1, 1977
4043054 Teaching machine Aug. 23, 1977
4034487 Automated testing stations Jul. 12, 1977
4005530 Audio-visual training device with selective branching Feb. 1, 1977
3968575 Teaching device Jul. 13, 1976
3942269 Audio-visual system including audio-visual slides Mar. 9, 1976











 
 
  Recently Added Patents
Plants and seeds of hybrid corn variety CH979678
Cylindrical LED fixture
Lens system
Method and apparatus for controlling a multi-node process
Integrated circuit packaging system with laser hole and method of manufacture thereof
Image forming unit having agitating portion and image forming apparatus
Storage device, data processing device, registration method, and recording medium
  Randomly Featured Patents
Control unit for use in a vibratory feeder system
Method for preparing polyester
Media feeding apparatus and image forming apparatus
Multifunctional arithmetic and logic unit in semiconductor integrated circuit
Clock for photographs
Acrylic polymers for molding
Biphenyl substituted dipeptide analogs promote release of growth hormone
Device for submerging material into liquid metal by an electromagnetic stirrer
Conveying arrangement
Communication device