| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 20 | |
| #2 | United Kingdom | 5 | |
| #3 | United States | 2 | |
| #4 | Ireland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Civil engineering | |
| #3 | Telecommunications | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Motor vehicles | |
| #2 | Vehicle tyre repairing | |
| #3 | Dredging | |
| #4 | Ladders | |
| #5 | Selecting | |
| #6 | Belts or cables for driving |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ritscher Karl | 7 |
| #2 | Karl Ritscher | 2 |
| #3 | Kniepkamp Ernst | 1 |
| #4 | Kniepkamp Dipl-Ing Ernst | 1 |
| #5 | Kniepkamp Heinrich Ernst | 1 |
| Publication | Filing date | Title |
|---|---|---|
| IE21223L | Ditch cleaning machine | |
| US2950548A | Ditch cleaning machine | |
| GB749500A | Ditch and like cleaning machine | |
| GB660495A | Anti-slip device for rubber-tyred tractors and the like | |
| GB667399A | Mobile ladder | |
| DE711323C | Light metal chain link for tracks u. like | |
| GB540010A | Traction chains for pneumatic tyres | |
| US2271275A | Antiskid device | |
| GB459104A | Improvements in or relating to lubricated bearings for the links of travelling chains |