FR758706A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvement of sound reproducers
Assignee: Edmond-Leon Canard
•
Filing: 1933-07-21
•
Granted: 1934-01-22
•
Expires: 1953-07-21
Abstract
No abstract record available.
Inventors
- 👤 Edmond-Leon Canard
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 15:56
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/323; H04R1/34; H04R1/345
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.