Patent FR1129331A successfully refreshed from Google Patents.
FR1129331A
Expired / Lapsed
FR
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Electronic tube for very high frequencies
Assignee: Siemens and Halske AG
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Filing: 1955-08-09
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Granted: 1957-01-18
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Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-06 10:11
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/40; H01J23/00; H01J23/16; H01J23/24; H01J25/48
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