| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Hand-held cutting tools | |
| #2 | Grinding or polishing devices | |
| #3 | Cutting | |
| #4 | Special designs | |
| #5 | Grinding tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walter Osberghaus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2129022A | Double edged safety razor | |
| GB442549A | Double-edged safety razor | |
| GB372891A | Automatic apparatus for treating razor blades | |
| GB368997A | A method of and apparatus for grinding razor blades | |
| GB309806A | Improvements in and relating to the grinding of convex surfaces |