FR833929A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to signaling systems
Assignee: Thales SA
•
Filing: 1937-06-18
•
Granted: 1938-11-04
•
Expires: 1957-06-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 12:06
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0803; H03; H03B; H03B7/00; H03B7/02; H03B7/10; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; H03K7/00; H03K7/08; H04B14/026; H04J; H04J3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.