Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US1998617A | Automatic volume control | HAMMOND HOLDING Corp | Expired / Lapsed | 1930-05-12 | 1935-04-23 | 1950-05-12 | 0.0 yrs | 0 | |
| US1998620A | Dynamic control by intertube coupling devices | HAMMOND HOLDING Corp | Expired / Lapsed | 1933-02-15 | 1935-04-23 | 1953-02-15 | 0.0 yrs | 0 |