| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 15 | |
| #2 | France | 7 | |
| #3 | Brazil | 5 | |
| #4 | Italy | 4 | |
| #5 | USSR (Union of Socialist Soviet Republics) | 4 | |
| #6 | United States | 4 | |
| #7 | Sweden | 3 | |
| #8 | Czechoslovakia | 2 | |
| #9 | United Kingdom | 2 | |
| #10 | Japan | 2 | |
| #11 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Gearing | |
| #4 | Marine propulsion | |
| #5 | Unspecified technologies | |
| #6 | Springs | |
| #7 | Certain plastics | |
| #8 | Shaping of plastics | |
| #9 | Fillers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hackforth Josef | 7 |
| #2 | Hackforth J | 5 |
| #3 | Lunke Manfred | 5 |
| #4 | Walter Juergen | 3 |
| #5 | Valter Yurgen | 2 |
| #6 | Faust W | 2 |
| #7 | Walter Jurgen | 2 |
| #8 | Hackforth B | 2 |
| #9 | Khakfort Jozef | 2 |
| #10 | Hackforth Bernhard | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3103107A1 | Flexible shaft coupling | |
| DE2813880A1 | Elastic claw coupling for two shafts - has elastic sections between claws secured by spring clips for changing without dismantling | |
| DE2720679A1 | SHAFT COUPLING WITH OVERLOAD PROTECTION | |
| ATA166077A | Elastic claw coupling | |
| DE2624500A1 | Shaft coupling with lugs separated by resilient elements - has sheaths embracing lugs to which resilient elements are bonded | |
| GB1499944A | Drive transmission | |
| FR2268186A1 | Flexible shaft coupling with elastomer discs - which form a space in which rings are mounted and which is filled with damping fluid | |
| US3906745A | Elastic coupling | |
| DE2337247A1 | FLEXIBLE COUPLING BODY FOR SHAFT COUPLINGS | |
| US3837178A | Flexible shaft coupling |