Resources Contact Us Home
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
Mirror elements for EUV lithography and production methods therefor
Memory access monitoring method and device
Method and apparatus for displaying system status with a wide range of viewing angle
Light emitting device
Light emitting diode having multi-cell structure and method of manufacturing the same
Chip on chip semiconductor device including an underfill layer having a resin containing an amine-based curing agent
Extensible framework for client-based active network measurement
  Randomly Featured Patents
Substituted pyrimidine compounds and methods of use
Liquid soap dispenser
Method for suppression of electrification
Methods and compositions for assaying for the production of 1,4-dihydropyridyl
Apparatus and method for sensing and responding to environmental conditions of a computer system at non-uniform polling intervals
Dispensing top for granulated material
Oven with a heat circulating device
Copying machine
Automatic gain control delay circuit for a video signal processor