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United States Patent 3442039

Inventors:
Saizelet, Jean Michel
Publication Date:
05/06/1969
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Assignee:
Jean, Michel Saizelet
Primary Class:
40/367
Other Classes:
D19/75, 312/183
International Classes:
G02B27/02; G03B21/64; G03B21/54; G09F13/20; A47B47/02; G09F13/10




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