Patent DE750179C successfully refreshed from Google Patents.
DE750179C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Method for evaluating double-sided usable account cards
Assignee: Emil Dueball
•
Filing: 1929-04-04
•
Granted: 1944-12-20
•
Expires: 1949-04-04
Abstract
No abstract record available.
Inventors
- 👤 Emil Dueball
- 👤 Richard Senkel
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-01 10:54
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.