Patent US4362449A successfully refreshed from Google Patents.
Patent FR731359A successfully refreshed from Google Patents.
FR731359A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Magnification device
Assignee: Hermann Wisper
•
Filing: 1932-02-13
•
Granted: 1932-09-02
•
Expires: 1952-02-13
Abstract
No abstract record available.
Inventors
- 👤 Hermann Wisper
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/06
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.