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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

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