Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2660662A | Search signal apparatus for determining the listening habits of wave signal receiver users | TNC US Holdings Inc | Expired / Lapsed | 1947-10-24 | 1953-11-24 | 1967-10-24 | 0.0 yrs | 0 | |
| US2660509A | Recording apparatus | TNC US Holdings Inc | Expired / Lapsed | 1948-11-04 | 1953-11-24 | 1968-11-04 | 0.0 yrs | 0 | |
| US2513360A | System for determining the listening habits of wave signal receiver users | TNC US Holdings Inc | Expired / Lapsed | 1947-01-09 | 1950-07-04 | 1967-01-09 | 0.0 yrs | 0 |