FR989642A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Method and devices applicable in particular to cinema, radio broadcasting and television, and making it possible in particular to obtain the stereophonic reproduction of sound
Assignee: RECH S ET D APPLIC TECH SOC D
•
Filing: 1944-02-19
•
Granted: 1951-09-11
•
Expires: 1964-02-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-26 23:04
CPC Classifications
H; H04; H04S; H04S1/00
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.