Piezoelectric crystal
United States Patent 2411298

Inventors:
Shore X, Sidney
Publication Date:
11/19/1946
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Assignee:
PHILIPS CORP
Primary Class:
29/25.350
Other Classes:
310/318, 324/727, 331/171, 333/141, 216/90, 331/158, 366/127, 324/76.410, 310/312
International Classes:
H03H3/04; H03H3/00