Patent FR669442A successfully refreshed from Google Patents.
FR669442A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Image separation and analysis devices for optical devices, including photography, cinematography, projection and stereoscopy
Assignee: Waclaw Swietochowski
•
Filing: 1929-02-09
•
Granted: 1929-11-15
•
Expires: 1949-02-09
Abstract
No abstract record available.
Inventors
- 👤 Waclaw Swietochowski
- 👤 Henryk Minkiewicz
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/1013; G02B27/14; G02B27/144; G02B27/145; G02B27/149
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.