Number | Date | Country | Kind |
---|---|---|---|
7700971 | Jan 1977 | NLX |
Number | Name | Date | Kind |
---|---|---|---|
3270179 | Russell | Aug 1966 | |
3794806 | Klasson | Feb 1974 | |
3832513 | Klasson | Aug 1974 |
Number | Date | Country |
---|---|---|
2449795 | May 1975 | DEX |
1444880 | Aug 1976 | GBX |
Entry |
---|
"Plasma Mig Welding", Welding and Metal Fabrication, Dec. 1974, pp. 417-419, Essers et al. |