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1948-08-17 |
Philips Lab Inc |
Piezoelectric apparatus
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1949-09-20 |
Rca Corp |
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1947-02-13 |
1950-05-16 |
Reeves Hoffman Corp |
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1949-10-11 |
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1958-12-02 |
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Piezoelectric device
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Method of improving ohmic contact through high-resistance oxide film
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