| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 2 | |
| #3 | France | 2 | |
| #4 | Germany | 1 | |
| #5 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Turning | |
| #3 | Gearing | |
| #4 | Grinding or polishing devices | |
| #5 | Thread cutting | |
| #6 | Sawing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wahlstrom Verner J | 3 |
| #2 | Halstead John F | 2 |
| #3 | Halstead John Fredrik | 1 |
| #4 | Lundin Axel G | 1 |
| #5 | Nace George E | 1 |
| #6 | Wahlstrom Verner Johan | 1 |
| #7 | Bronander Bertil Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1608113A | Chuck | |
| CA189333A | Chuck | |
| US1260896A | Tapping attachment for boring-machines. | |
| US1250864A | Chuck. | |
| US1224596A | Tapping attachment for boring-machines. | |
| DE384056C | Clamp chucks for tools and workpieces | |
| US1162197A | Chuck. | |
| US1127121A | Expanding reamer. | |
| CA140498A | Chuck | |
| US1075174A | Chuck. |