Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2813929A | Automatic signalling system | Government of Netherlands | Expired / Lapsed | 1952-10-24 | 1957-11-19 | 1972-10-24 | 0.0 yrs | 0 | |
| US2741665A | Control of an automatic signalling system | Government of Netherlands | Expired / Lapsed | 1952-11-12 | 1956-04-10 | 1972-11-12 | 0.0 yrs | 0 |