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Class Information
Number:
434/329
Name:
Education and demonstration
>
Question or problem eliciting response
>
Correctness of response indicated to examine by self-operating or examinee actuated means
> Involving fluid flow
Description:
Subject matter wherein the correctness of the examinee"s response is revealed by means involving movement of a fluid.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
4354845
Identification structure for games and educational use and for other use
Oct. 19, 1982
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