Patent DE844170C successfully refreshed from Google Patents.
DE844170C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Speaker arrangement
Assignee: Siemens Corp
•
Filing: 1950-08-08
•
Granted: 1952-07-17
•
Expires: 1970-08-08
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Dipl-Ing Kalusche
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-07 19:50
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/24
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.