Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7134528 | Hydraulic elevator with valve for preventing discharge of pressure accumulator and method of controlling same | Richard von Holzen | 2006-11-14 |
| 6986409 | Apparatus for determining the position of an elevator car | — | 2006-01-17 |