U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."

T. Craven, FCC Commissioner ; 1961

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Class 434 - Education and demonstration

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427 Subclasses


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Definition

This is the generic class for apparatus and processes not elsewhere classifiable for: providing instruction about a subject or means; testing or grading a person’s knowledge, skill, discipline, or mental or physical ability; displaying for purpose of comparison contrast, or demonstration; demonstrating characteristics and advantages of apparatus, objects, or processes; and cryptography apparatus.

 
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