Patent Abstracts of Japan, vol.013, No. 299, Jul. 11, 1989 & JP 01 087871, Mar. 31, 1989, Abstract. |
Patent Abstracts of Japan, vol.004, No. 089, Jun. 25, 1980 & JP 55 054034, Apr. 21, 1980, Abstract. |
Database WPI, Derwent Publications Ltd., Longon, GB; AN 1989327430, XP002124327 & JP 01 242144 A (Yoshida T.), Mar. 19, 1988, Abstract. |
Patent Abstracts of Japan, vol. 010, No. 004, Jan. 9, 1986 & JP 60 166020 A, Aug. 29, 1985, Abstract. |
Database WPI, Derwent Publications Ltd., Longon, GB; AN 1988-025472 XP002124328 & JP 62 286464 A, Dec. 12, 1987, Abstract. |
International Search Report. |