DE420825C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Objective consisting of a concave-convex diverging lens facing the object and a concave-convex converging lens following at a distance
Assignee: DR PAUL RUDOLPH
•
Filing: —
•
Granted: 1925-10-31
•
Expires: 1942-10-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 07:22
CPC Classifications
G; G02; G02B; G02B13/00
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.