Patent Abstracts of Japan, vol. 014, No. 211 (C-0715), May 2, 1990 (May 2, 1990) & JP 02 047241 A (Nippon Steel Corp), Feb. 16, 1990 (Feb. 16, 1990). |
Patent Abstracts of Japan, vol. 012, No. 358 (C-531), Sep. 26, 1988 (Sep. 26, 1988) & JP 63 114937 A (Kubota Ltd.), May 19, 1988 (May 19, 1988). |
Patent Abstracts of Japan, vol. 008, No. 251 (C 252), Nov. 16, 1984 (Nov. 16, 1984) & JP 59 129757 A (Kubota Tekko KK), Jul. 26, 1984 (Jul. 16, 1984). |
Patent Abstracts of Japan, vol. 1995, No. 08, Sep. 29, 1995 (Sep. 29, 1985) & JP 07 126795 A (Yodogawa Steel Works Ltd), May 16, 1995 (May 16, 1995). |
Patent Abstracts of Japan, vol. 018, No. 468 (C-1244), Aug. 31, 1994 (Aug. 31, 1994), & JP 06 145888 A (Hitachi Metals Ltd.), May 27, 1994 (May 27, 1994). |