Number | Date | Country | Kind |
---|---|---|---|
015934/77 | Dec 1977 | CHX |
Number | Name | Date | Kind |
---|---|---|---|
3900592 | Kennedy et al. | Aug 1975 | |
3953619 | Matsubara | Apr 1976 |
Number | Date | Country |
---|---|---|
2410483 | Sep 1974 | DEX |
Entry |
---|
Roikh et al., "Zashchita Metalov", V13, No. 6, Nov.-Dec. 1977, (English Tslation Protection of Metals) pp. 545-555. |