Number | Date | Country | Kind |
---|---|---|---|
3-017747 | Feb 1991 | JPX | |
3-142163 | Jun 1991 | JPX | |
3-143465 | Jun 1991 | JPX | |
3-145901 | Jun 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3060041 | Loewenstein | Oct 1962 | |
4055435 | Sagara | Oct 1977 | |
4179300 | Sagara | Dec 1979 | |
4390638 | Mennemann et al. | Jun 1983 | |
4400473 | Mennemann et al. | Aug 1983 | |
4830989 | Trivedi et al. | May 1989 |
Number | Date | Country |
---|---|---|
0013379 | Jul 1980 | EPX |
0227269 | Jul 1987 | EPX |
1561647 | Feb 1969 | FRX |
2172892A | Oct 1986 | GBX |
Entry |
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Patent Abstracts of Japan, vol. 13, No. 461 (C-645) 18 Oct. 1989 & JP-A-01 179 741, Jul. 17, 1989. |
World Patents Index Latest, Week 03, Derwent Publications Ltd., AN 90-096954 & JP-A-2 050 834, Feb. 20, 1990. |