Number | Date | Country | Kind |
---|---|---|---|
6-11894 | Apr 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
D291087 | Salmi et al. | Jul 1987 | |
2638021 | Van Der Heidan | May 1953 | |
3860354 | Hougen | Jan 1975 | |
4322188 | Hougen | Mar 1982 | |
4767245 | Shoji et al. | Aug 1988 | |
4871287 | Hougen | Oct 1989 | |
5281060 | Strange et al. | Jan 1994 |