Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6128116 | Retroreflective elevator hoistway position sensor | D. Richard Schafer, Julian H. Shull | 2000-10-03 | $57,568,000 |
| 6095289 | Apparatus and method of thermally detecting elevator machine brake | Sib S. Ray | 2000-08-01 | $63,821,000 |
| 6032761 | Elevator hoistway terminal zone position checkpoint detection apparatus using a binary coding method for an emergency terminal speed limiting device | Steven D. Coste | 2000-03-07 | $35,164,000 |