Patent Explorer
Browse, filter, and analyze 4 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1540786A | Telephone system | Automatic Electric Co | Expired / Lapsed | 1923-01-11 | 1925-06-09 | 1943-01-11 | 0.0 yrs | 0 | |
| US1414686A | Call indicator for automatic telephone systems | Automatic Electric Co | Expired / Lapsed | 1916-07-10 | 1922-05-02 | 1936-07-10 | 0.0 yrs | 0 | |
| US1227523A | Phonographic time-announcer. | Automatic Electric Co | Expired / Lapsed | 1913-07-07 | 1917-05-22 | 1933-07-07 | 0.0 yrs | 0 | |
| US1196876A | Automatic telephone and supervisory system. | Automatic Electric Co | Expired / Lapsed | 1907-11-30 | 1916-09-05 | 1927-11-30 | 0.0 yrs | 0 |