DE734732C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Microphone arrangement for sound transmission from noise-filled rooms
Assignee: Telefunken AG
•
Filing: 1941-06-12
•
Granted: 1943-04-22
•
Expires: 1961-06-12
Abstract
No abstract record available.
Inventors
- 👤 Dr Heinrich Benecke
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-28 19:28
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/40; H04R1/406
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.