Piezoelectric system
United States Patent 2447061
Inventors:
Franklin, Constance W.
Publication Date:
08/17/1948
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Assignee:
CAMBRIDGE THERMIONIC CORP
Primary Class:
Other Classes:
451/910, 310/334, 451/42, 366/108, 29/25.350
International Classes:
G10K11/32; G10K11/00
Foreign References:
| DE654673C |