Number | Name | Date | Kind |
---|---|---|---|
2167424 | Novack | Jul 1939 | |
3036367 | Ricks | May 1962 | |
3314278 | Bergman | Apr 1967 | |
3962897 | Way et al. | Jun 1976 |
Number | Date | Country |
---|---|---|
55-73407 | Jun 1980 | JPX |
599904 | Mar 1978 | SUX |
Entry |
---|
Translation of Article "Commercial Tests of Die-Forged Piercing Mandrels", B. D. Kopysky et al., Vsesoyuzny zaochny mashinostroitelny institut and Dnepropetrovsky truboprokatny zavoid im. Lenina, pp. 55, 56. |