Patent Explorer
Browse, filter, and analyze 5 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1792752A | Light control | DRAHTLOSE TELEGRAPHIE MBH | Expired / Lapsed | 1927-03-21 | 1931-02-17 | 1947-03-21 | 0.0 yrs | 0 | |
| US1792766A | Electric-light relay | DRAHTLOSE TELEGRAPHIE MBH | Expired / Lapsed | 1927-01-05 | 1931-02-17 | 1947-01-05 | 0.0 yrs | 0 | |
| US1708524A | Railway signaling | DRAHTLOSE TELEGRAPHIE MBH | Expired / Lapsed | 1925-12-02 | 1929-04-09 | 1945-12-02 | 0.0 yrs | 0 | |
| US1559992A | Arrangement for frequency transformation particularly for operating relay stations | DRAHTLOSE TELEGRAPHIE MBH | Expired / Lapsed | 1922-08-18 | 1925-11-03 | 1942-08-18 | 0.0 yrs | 0 | |
| US1489158A | Arrangement for the audible receiving of undamped oscillations | DRAHTLOSE TELEGRAPHIE MBH | Expired / Lapsed | 1922-08-18 | 1924-04-01 | 1942-08-18 | 0.0 yrs | 0 |