FR837587A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Secret telecommunications system
Assignee: Compteurs Schlumberger SA
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Filing: 1938-05-06
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Granted: 1939-02-14
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Expires: 1958-05-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/02
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