Patent Explorer
Browse, filter, and analyze 5 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3326176A | Work-registration device including ionic beam probe | National Research Corp | Expired / Lapsed | 1964-10-27 | 1967-06-20 | 1984-10-27 | 0.0 yrs | 2 | |
| US3009098A | Electrical apparatus for analyzing gases | National Research Corp | Expired / Lapsed | 1958-08-15 | 1961-11-14 | 1978-08-15 | 0.0 yrs | 0 | |
| US2936107A | High vacuum device | National Research Corp | Expired / Lapsed | 1956-06-14 | 1960-05-10 | 1976-06-14 | 0.0 yrs | 0 | |
| US2890878A | Apparatus for annealing in a high vacuum | National Research Corp | Expired / Lapsed | 1956-12-28 | 1959-06-16 | 1976-12-28 | 0.0 yrs | 2 | |
| US2824488A | Apparatus for grading fibers | National Research Corp | Expired / Lapsed | 1954-08-25 | 1958-02-25 | 1974-08-25 | 0.0 yrs | 0 |