| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 31 | |
| #2 | France | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Furniture and games | |
| #5 | Environmental technology | |
| #6 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Turning | |
| #2 | Accessories for machine tools | |
| #3 | Grates | |
| #4 | Unspecified technologies | |
| #5 | Household appliances | |
| #6 | Grinding or polishing devices | |
| #7 | Milling | |
| #8 | Combustion residues removal | |
| #9 | Travel equipment | |
| #10 | Thread cutting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Berg Wilhelm | 7 |
| #2 | Wilhelm Berg | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2006621A | Motor operated chuck for lathes and other machine tools | |
| US1971638A | Motor operated chuck for lathes and other machine tools | |
| GB383162A | Power operated chuck | |
| US1880681A | Multiple-spindle automatic lathe | |
| GB324599A | Improvements in or relating to multiple-spindle automatic lathes | |
| GB291688A | Improvements in or relating to jaw chucks for machine tools |