Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6030657 | Labeling technique for countering product diversion and product counterfeiting | Charles L. Butland | 2000-02-29 | |
| 5609224 | Elevator door sill | — | 1997-03-11 | $20,879,000 |
| 5366044 | Bidirectional eddy current overspeed protection for elevators | Eric K. Jamieson, Young S. Yoo | 1994-11-22 | $2,477,000 |