Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2623931A | Circuit for detection of frequency differences and apparatus employing same | ALERTRONIC PROTECTIVE CORP OF | Expired / Lapsed | 1948-12-04 | 1952-12-30 | 1968-12-04 | 0.0 yrs | 0 | |
| US2615970A | Dummy intruder for intruder detection systems | ALERTRONIC PROTECTIVE CORP OF | Expired / Lapsed | 1951-09-12 | 1952-10-28 | 1971-09-12 | 0.0 yrs | 0 |