Patent DE839828C successfully refreshed from Google Patents.
DE839828C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Electric hand lamp with reflector and own power source
Assignee: Friemann and Wolf GmbH
•
Filing: 1944-03-29
•
Granted: 1952-05-26
•
Expires: 1964-03-29
Abstract
No abstract record available.
Inventors
- 👤 Paul Dr H C Wolf
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 16:03
CPC Classifications
F; F21; F21L; F21L4/00; F21L4/005; F21V; F21V14/00; F21V14/04; F21V14/045; F21V17/00; F21V17/10; F21V17/14; F21V23/00; F21V23/04; F21V23/0414; F21V23/0428
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.