Number | Name | Date | Kind |
---|---|---|---|
4907625 | Ito et al. | Mar 1990 | |
4994524 | Udipi | Feb 1991 |
Number | Date | Country |
---|---|---|
2505700 | Aug 1975 | DEX |
3739089 | May 1988 | DEX |
1017653 | Jan 1966 | GBX |
Entry |
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World Patents Index Latest, Week 8732, Derwent Publications Ltd., London, GB; AN 87-223656 & JP-A-62 147 188 (Ube Industries) Jul. 1, 1987. |