DE577708C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Typewriter keyboard
Assignee: JULIUS KUPFAHL
•
Filing: 1929-09-11
•
Granted: 1933-06-03
•
Expires: 1949-09-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-24 22:42
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/10
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.