| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 19 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Machine tools | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Clutches and brakes | |
| #3 | Pipes | |
| #4 | Lubricating | |
| #5 | Rolling metal | |
| #6 | Construction of roads | |
| #7 | Unspecified technologies | |
| #8 | Foundations and excavations | |
| #9 | Metal wire processing | |
| #10 | Dredging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rosenthal Erich | 20 |
| Publication | Filing date | Title |
|---|---|---|
| DE2446122A1 | Sealing ring with two sealing surfaces - has flexible lip attached to close-fitting rigid element | |
| US3923125A | Apparatus for the controlled feeding of lubricants and coolants to rotating surfaces in contact |