| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Japan | 3 | |
| #3 | United States | 3 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | France | 2 | |
| #6 | German Democratic Republic | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Springs | |
| #4 | Nails |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hartz Helmut | 11 |
| #2 | Herumuuto Harutsu | 3 |
| Publication | Filing date | Title |
|---|---|---|
| DE3925678A1 | TORQUE TRANSFERING CLUTCH | |
| DE3616209A1 | PTO SHAFT WITH TWO CARDANO JOINTS | |
| EP0019283A2 | Torsional vibration damper | |
| US4011021A | Compensatory joint | |
| DE2505935A1 | Flexible coupling between rotating shafts - has several rings of elastic material with reinforcing insert layers between hub and flange | |
| DE2453688A1 | ELASTIC COUPLING |