Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3375750A | Three axis optical alignment device | Keuffel and Esser Co | Expired / Lapsed | 1961-09-15 | 1968-04-02 | 1981-09-15 | 0.0 yrs | 1 | |
| US2500460A | Slide rule | Keuffel and Esser Co | Expired / Lapsed | 1949-07-11 | 1950-03-14 | 1969-07-11 | 0.0 yrs | 0 |