| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | Japan | 3 | |
| #5 | Australia | 1 | |
| #6 | Brazil | 1 | |
| #7 | China | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Materials and metallurgy | |
| #3 | Chemical engineering | |
| #4 | Thermal processes | |
| #5 | Control | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting | |
| #2 | Plasma technique | |
| #3 | Casting metal | |
| #4 | Pig-iron processing | |
| #5 | Burners | |
| #6 | Systems controlling non-electric variables | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fuhrhop Ronald Elmer | 6 |
| #2 | Makara Raymond John | 4 |
| #3 | Fuhrhop Ronald E | 3 |
| #4 | Carkhuff Donald W | 3 |
| #5 | Makara Raymond J | 2 |
| #6 | Acomb Byron H | 1 |
| #7 | Donarudo Uesurei Kaakuhotsufu | 1 |
| #8 | Severance Jr Wayne S | 1 |
| #9 | Aran Roi Uonderuto | 1 |
| #10 | Carkhuff Donald Wesley | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4977305A | System for low voltage plasma arc cutting | |
| US4795138A | Metallurgical tuyere and method of calibrating same | |
| CA1323828C | Scarfing nozzles | |
| US4716269A | Plasma arc torch having supplemental electrode cooling mechanisms |