Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2289939A | Telephone system | Associated Telephone and Telegraph Co | Expired / Lapsed | 1939-12-18 | 1942-07-14 | 1959-12-18 | 0.0 yrs | 0 | |
| US2248784A | Electrical signaling system | Associated Telephone and Telegraph Co | Expired / Lapsed | 1939-01-18 | 1941-07-08 | 1959-01-18 | 0.0 yrs | 0 | |
| US1789811A | Counting or reglstering apparatus | Associated Telephone and Telegraph Co | Expired / Lapsed | 1924-09-29 | 1931-01-20 | 1944-09-29 | 0.0 yrs | 0 |