Patent DE437583C successfully refreshed from Google Patents.
DE437583C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Propeller drive by means of a chain protected against water for rowing and sailing boats
Assignee: HANS KAUFFMANN DIPL ING
•
Filing: 1924-09-13
•
Granted: 1926-11-26
•
Expires: 1944-09-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/14; B63H20/32; B63H20/34; B63H23/00; B63H23/02; B63H2023/0208; B63H2023/025
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.