Patent US4829254A successfully refreshed from Google Patents.
Patent US1090694A successfully refreshed from Google Patents.
Patent DE526405C successfully refreshed from Google Patents.
DE526405C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Two-way traffic transmission system with feedback barriers
Assignee: Siemens and Halske AG
•
Filing: 1929-01-29
•
Granted: 1931-06-05
•
Expires: 1949-01-29
Abstract
No abstract record available.
Inventors
- 👤 Dipl-Ing Dietwalt Thierbach
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 06:51
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50
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.