Patent FR699779A successfully refreshed from Google Patents.
FR699779A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to sound reproduction equipment with amplifying devices
Assignee: Heinrich Johanne Kuchenmeister
•
Filing: 1929-10-29
•
Granted: 1931-02-19
•
Expires: 1949-10-29
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Johanne Kuchenmeister
- 👤 Berthold Freund
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 23:27
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64
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.