| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Turning | |
| #3 | Grinding or polishing devices | |
| #4 | Clutches and brakes | |
| #5 | Unspecified technologies | |
| #6 | Thread cutting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Poorman John E | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2870661A | Knurling tool | |
| US2724302A | Tool to be attached to a screw machine or the like | |
| US2579611A | Knurling tool | |
| US2384044A | Reversing mechanism | |
| US2343577A | Grinding machine | |
| US2309669A | Grinding machine | |
| US2309668A | Grinding machine | |
| US2206047A | Tap and die holder | |
| US2188917A | Tool post | |
| US2047222A | Tool holder | |
| CA503931A | Knurling tool | |
| CA365594A | Tool holder |