Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5821478 | Generation of an elevator door close warning | Helmut Schroder-Brumloop | 1998-10-13 | $7,198,000 |
| 5711112 | Double-drive automatic sliding door operator | Michael Barten, Helmut Schroder-Brumloop, Mustapha Toutaoui | 1998-01-27 | $31,754,000 |
| 5587565 | Method for controlling elevator doors | Helmut Schroder-Brumloop | 1996-12-24 | $11,471,000 |
| 5367240 | Low cost current sensor for fast-switching inverter applications | Helmut Schroder-Brumloop | 1994-11-22 | $2,477,000 |