| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 7 | |
| #2 | United States | 4 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Making needles | |
| #2 | Nails | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Swangren Edwin V | 5 |
| #2 | Tripp Elbert D | 3 |
| #3 | Swangren Karl E | 1 |
| #4 | Williams George N | 1 |
| #5 | Jones-Whittey George | 1 |
| #6 | Winwood Charles | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2303005A | Nail heading machine | |
| US2077784A | Process of manufacturing nails | |
| US1839450A | Nail capping machine | |
| US1652648A | Soft-metal washer for nails | |
| CA549478A | Lead head nail machine | |
| CA368560A | Nail manufacture | |
| CA330410A | Nail lead-heading machine | |
| CA293640A | Soft metal washer for nails | |
| CA298969A | Nail capping machine | |
| CA399086A | Nail | |
| CA298723A | Method of manufacturing lead-headed nails |