FR993891A
Expired / Lapsed
FR
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Piezoelectric crystal frequency inverter device
Assignee: Daniel Rene Beretzki
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Filing: 1944-11-07
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Granted: 1951-11-08
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Expires: 1964-11-07
Abstract
No abstract record available.
Inventors
- 👤 Daniel Rene Beretzki
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 01:15
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/08
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References Cited (Backward Citations)
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