| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Punching metal | |
| #2 | Electrically-conductive connections | |
| #3 | Making metal sheets |
| # | Name | Total Patents |
|---|---|---|
| #1 | Benfield John D | 11 |
| #2 | Kozinski Richard R | 3 |
| Publication | Filing date | Title |
|---|---|---|
| CA961752A | Pipe bending tool | |
| US3253441A | Pipe bending tool | |
| US3063314A | Pipe and tubing bender | |
| US2906149A | Pipe and tubing bender | |
| US2817986A | Pipe and tubing bender | |
| US2584537A | Pipe and tubing bender | |
| US2287857A | Connector | |
| CA615708A | Pipe and tubing bender | |
| CA750665A | Pipe bending tool | |
| CA597564A | Pipe and tubing bender | |
| CA507283A | Pipe and tubing bender |