FR587804A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to automatic and semi-automatic telephone systems
Assignee: Thales SA
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Filing: 1924-10-21
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Granted: 1925-04-24
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Expires: 1944-10-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 19:02
CPC Classifications
H; H04; H04Q; H04Q3/00
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