Number | Date | Country | Kind |
---|---|---|---|
1-45189 | Feb 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1963320 | Wright | Jun 1934 | |
2392821 | Kreag | Jan 1946 | |
4466265 | Wessel | Aug 1984 |
Number | Date | Country |
---|---|---|
2231924 | Feb 1973 | DEX |
192504 | Aug 1988 | JPX |
Entry |
---|
Patent Abstracts of Japan, vol. 12, No. 466, (M-722)(3313), Dec. 7, 1988; and JPA-63-192-504. |
DE-C-489,432, (Rheinisch-Westfaelische Stahl-Und Walzwerke AG), 1/1930. |