Patent FR775561A successfully refreshed from Google Patents.
FR775561A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
A multi-element phonograph soundbox device of various sizes and operating with a single diaphragm
Assignee: Casanova Francois
•
Filing: 1934-02-26
•
Granted: 1935-01-04
•
Expires: 1954-02-26
Abstract
No abstract record available.
Inventors
- 👤 Casanova Francois
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-05 16:36
CPC Classifications
G; G10; G10K; G10K13/00
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.