Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3074486A | Kick sub | Shaffer Tool Works | Expired / Lapsed | 1958-04-22 | 1963-01-22 | 1978-04-22 | 0.0 yrs | 2 | |
| US3023012A | Submarine drilling head and blowout preventer | Shaffer Tool Works | Expired / Lapsed | 1959-06-09 | 1962-02-27 | 1979-06-09 | 0.0 yrs | 0 |