| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | Australia | 1 | |
| #4 | Denmark | 1 | |
| #5 | Spain | 1 | |
| #6 | Finland | 1 | |
| #7 | Italy | 1 | |
| #8 | Norway | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Simon Ulrich | 8 |
| #2 | Weisse Dietrich | 7 |
| #3 | Duerr Walter | 6 |
| #4 | Durr Walter | 2 |
| #5 | Dietrich Weisse | 1 |
| #6 | Weisse Dietrich Ing Grad | 1 |
| #7 | Von Neufville-Schoepflin Fried | 1 |
| #8 | Walter Durr | 1 |
| #9 | Ulrich Simon | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO8400451A1 | Method and device for controlling the rotation speed of an asynchronous motor | |
| DE3310206A1 | Method and circuit arrangement for controlling the speed of an asynchronous motor | |
| DE3226150A1 | Device and method for controlling the speed of a three-phase motor driving a pump | |
| EP0053799A1 | Method and circuit arrangement for regulating or controlling the speed of a three-phase AC motor |