FR702268A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Photoelectric device with selenium cells
Assignee: Siemens and Halske AG
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Filing: 1930-09-16
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Granted: 1931-04-03
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Expires: 1950-09-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
H; H10; H10F; H10F30/00
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