FR581014A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
screen with optical device for light projections
Assignee: Charles Roche
•
Filing: 1924-05-01
•
Granted: 1924-11-21
•
Expires: 1944-05-01
Abstract
No abstract record available.
Inventors
- 👤 Charles Roche
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
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.