FR893479A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to high frequency signaling systems
Assignee: Koninklijke Philips NV
•
Filing: 1943-04-12
•
Granted: 1944-07-28
•
Expires: 1963-04-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-06 06:06
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/026; H04B14/002; H04B14/006
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.