Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D282817 | Positioner to support a gas cutting torch, a welding torch or the like | David E. Johnson | 1986-03-04 |
| 4571478 | Electrode drive and nozzle system for an automatic air carbon-arc cutting and gouging torch | David E. Johnson, Larry A. Abersold | 1986-02-18 |
| D281250 | Combined electrode drive and nozzle unit for an automatic air carbon-arc cutting and gouging torch | David E. Johnson, Larry A. Aebersold | 1985-11-05 |
| 4540225 | Swivel cable coupling for an air carbon-arc cutting and gouging torch | David E. Johnson | 1985-09-10 |
| 4527037 | Electrode drive and nozzle system for an automatic air carbon-arc cutting and gouging torch | David E. Johnson, Larry A. Aebersold | 1985-07-02 |
| D273097 | All position tractor for mounting a tool such as a welding, cutting or gouging torch | David E. Johnson, William J. Coughlin | 1984-03-20 |
| 4422384 | All position tractor | David E. Johnson, William J. Coughlin | 1983-12-27 |
| D271290 | Heavy duty machine carriage | William J. Coughlin, David E. Johnson | 1983-11-08 |
| 4330109 | Heavy duty carriage assembly | William J. Coughlin, David E. Johnson | 1982-05-18 |