DE596115C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Holder for a piston-vibrating diaphragm of acoustic devices, which is formed by one or more curved springs following the edge of the diaphragm
Assignee: Telefunken AG
•
Filing: 1930-02-16
•
Granted: 1934-04-27
•
Expires: 1950-02-16
Abstract
No abstract record available.
Inventors
- 👤 Dr Walter Schottky
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-05 14:15
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20
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.