Number | Date | Country | Kind |
---|---|---|---|
3-345550 | Dec 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2621134 | Welch | Dec 1952 | |
4233336 | Verdult et al. | Nov 1980 |
Number | Date | Country |
---|---|---|
53-78986 | Jul 1978 | JPX |
57-125283 | Aug 1982 | JPX |
59-25874 | Feb 1984 | JPX |
Entry |
---|
Database WPI Section Ch, Week 33, Derwent Publications Ltd. London, GB; Class A85, AN-7859441 & JP-A-53 078 986 (Dainippon) Jul. 1978 Abstract. |
Patent Abstracts of Japan vol. 6, No. 223 (C-133) Nov. 1982 & JP-A-57 125 283 (Tokyo Shibaura) Aug. 4, 1982 Abstract. |