DE451892C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Pressure telegraph receiver
Assignee: Nokia Bell NV
•
Filing: 1922-03-21
•
Granted: 1927-11-04
•
Expires: 1942-03-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; H04L17/26; H04L17/22
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.