| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 4 | |
| #3 | Japan | 3 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting | |
| #2 | Unspecified technologies | |
| #3 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hallenbeck Emerson J | 11 |
| #2 | Emaason Jiei Hoorenbetsuku | 3 |
| #3 | Boucher Donald C | 2 |
| #4 | Donarudo Shii Bouchiyaa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5100043A | Purge gas unit with bladders | |
| US4415114A | Purge gas unit with cones | |
| US4254321A | Expandable purge unit | |
| US4096372A | Purge unit | |
| US3994429A | Purge unit for welding apparatus | |
| US3895924A | Consumable weld insert |