Title:
Telephone mouthpiece
United States Patent 1508310


Inventors:
Houte, Frederik Leendert Van
Application Number:
US65979523A
Publication Date:
09/09/1924
Filing Date:
08/28/1923
Assignee:
Houte, Frederik Leendert Van
Primary Class:
Other Classes:
381/344
International Classes:
H04M1/19
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