| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 2 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Denmark | 1 | |
| #5 | Finland | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Italy | 1 | |
| #8 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Wing fittings | |
| #3 | Indexing scheme relating to hinges | |
| #4 | Gearing | |
| #5 | Doors and windows | |
| #6 | Mechanical control devices | |
| #7 | Safety devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pradler Josef | 5 |
| #2 | Pradler J | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE2846862A1 | CLUTCH GEAR UNIT | |
| DE2754754A1 | Limited power output drive transmission - accommodates slipping or externally operated clutch or coupling to actuate stopping switch | |
| CH612537A5 | Safety coupling, which can be disconnected electrically, in a torque switch |