| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 19 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Electrical machinery and energy | |
| #5 | Environmental technology | |
| #6 | Furniture and games |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hammer Wilhelm | 11 |
| #2 | Wilhelm Hammer | 4 |
| #3 | Hammer Guenther Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3176667A | Piston engine | |
| DE1131624B | Base plate for expansion segments in mining operations | |
| GB793234A | Vice for holding workpieces | |
| US2818786A | Vise for holding workpieces | |
| DE679411C | Quick change chuck | |
| US2189002A | Quick releasing chuck | |
| GB480846A | Oscillatable chuck especially for boring tools shiftable in direction relative to the axis and adapted to be locked in central position | |
| GB291450A | Improvements in or relating to the electrical heating of furnaces |