Number | Date | Country | Kind |
---|---|---|---|
54-002041 | Jan 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3287678 | Okamoto et al. | Nov 1966 | |
3315196 | Kawahara et al. | Apr 1967 | |
3743853 | Dittman et al. | Jul 1973 | |
3898601 | Meindl | Aug 1975 | |
3908264 | Friberg et al. | Sep 1975 | |
4004251 | Hesler et al. | Jan 1977 | |
4031496 | Fujiwara et al. | Jun 1977 |