Patent Explorer
Browse, filter, and analyze 5 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2659043A | Apparatus for converting direct current into alternating current | NORDEN LAB CORP | Expired / Lapsed | 1949-10-01 | 1953-11-10 | 1969-10-01 | 0.0 yrs | 2 | |
| US2561140A | Variable resistor | NORDEN LAB CORP | Expired / Lapsed | 1949-07-30 | 1951-07-17 | 1969-07-30 | 0.0 yrs | 0 | |
| US2558850A | Vertical velocity control for aircraft | NORDEN LAB CORP | Expired / Lapsed | 1946-07-22 | 1951-07-03 | 1966-07-22 | 0.0 yrs | 0 | |
| US2498967A | Potentiometer | NORDEN LAB CORP | Expired / Lapsed | 1949-12-10 | 1950-02-28 | 1969-12-10 | 0.0 yrs | 0 | |
| US2499222A | Follow-up system | NORDEN LAB CORP | Expired / Lapsed | 1946-07-17 | 1950-02-28 | 1966-07-17 | 0.0 yrs | 0 |