Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3691361A | Area navigation system for automatically selecting waypoints on the track and lying at a right angle from a master station | Butler National Corp | Expired / Lapsed | 1970-11-13 | 1972-09-12 | 1990-11-13 | 0.0 yrs | 15 | |
| US3495241A | Navigation system for correcting slant range errors | Butler National Corp | Expired / Lapsed | 1968-06-10 | 1970-02-10 | 1988-06-10 | 0.0 yrs | 0 |