DE414018C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Audio receiver with constant attenuation
Assignee: Koch and Sterzel AG
•
Filing: 1924-02-16
•
Granted: 1925-05-26
•
Expires: 1944-02-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-02 22:44
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/163
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.