Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5644831 | Method for construction of a universal modular apparatus for selectively forming curved concave and convex sections of a refrigerated display case | — | 1997-07-08 |
| 5501516 | Universal modular apparatus for selectively forming curved concave and convex sections of a refrigerated display case | — | 1996-03-26 |
| 4631355 | Telautograph system | Sigurd G. Waaben | 1986-12-23 |
| 4519024 | Two-terminal transistor rectifier circuit arrangement | Sigurd G. Waaben | 1985-05-21 |
| 4440985 | Apparatus for determining the location of faults in a transmission line | Sigurd G. Waaben | 1984-04-03 |
| 4349776 | DC-to-DC Converters utilizing FET devices | Sigurd G. Waaben | 1982-09-14 |