Patent US3814445A successfully refreshed from Google Patents.
Patent DE670345C successfully refreshed from Google Patents.
← Back to Patent Explorer
DE670345C Expired / Lapsed DE ⏱️ 0.0 years remaining

Letter opener with hand lever and exchangeable knife

Assignee: AMALIE GUENNER GEB NEININGER
•
Filing: 1936-12-04
•
Granted: 1939-01-17
•
Expires: 1956-12-04
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Amalie Guenner Geb Neininger

Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-11-07 20:10
CPC Classifications
B; B43; B43M; B43M7/00; B43M7/007

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.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag