Number | Date | Country | Kind |
---|---|---|---|
3-231288 | Sep 1991 | JPX | |
3-314431 | Nov 1991 | JPX | |
4-141565 | Jun 1992 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3947373 | Sobajima et al. | Mar 1976 |
Number | Date | Country |
---|---|---|
0421193 | Sep 1990 | EPX |
3525301 | Jan 1987 | DEX |
2-169653 | Jun 1990 | JPX |
1-242442 | Sep 1990 | JPX |
Entry |
---|
Derwent Publications Ltd., London, GB AN 89-117728 of Japanese Patent Abst. No. JP-A-1 062 337, Mar. 8, 1989. |
Derwent Publications Ltd., London, GB AN 87-165763 of Japanese Patent Abstract No. JP-A-62 096 538, May 6, 1987. |
Derwent Publications Ltd., London, GB AN 81-22423D of Japanese Patent Abstract No. JP-A-56 011 946, Feb. 5, 1981. |