Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1883562A | Sound film and method of making same | ANDREW LE ROY CHIPMAN | Expired / Lapsed | 1928-11-05 | 1932-10-18 | 1948-11-05 | 0.0 yrs | 0 | |
| US1832097A | Talking motion picture film and method of making same | ANDREW LE ROY CHIPMAN | Expired / Lapsed | 1928-07-09 | 1931-11-17 | 1948-07-09 | 0.0 yrs | 0 |