Patent FR759552A successfully refreshed from Google Patents.
FR759552A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Recorder-style heaters, to eliminate parasitic vibrations in sound recording
Assignee: Johnson
•
Filing: 1932-11-04
•
Granted: 1934-02-05
•
Expires: 1952-11-04
Abstract
No abstract record available.
Inventors
- 👤 Johnson
- 👤 Ivan Serginsky
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 15:27
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46; G11B3/48
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.