Number | Date | Country | Kind |
---|---|---|---|
8106319 | Oct 1981 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
3335488 | Cole | Aug 1967 | |
3672035 | Lieberman | Jun 1972 | |
3863327 | Legate et al. | Feb 1975 | |
3900148 | Chadwick et al. | Aug 1975 | |
4003513 | Int. Res. & Dev. Co. Ltd. | Jan 1977 | |
4010965 | Izuma et al. | Mar 1977 | |
4248373 | Linse et al. | Feb 1981 |
Number | Date | Country |
---|---|---|
2728409 | Apr 1978 | DEX |
55-5114 | Jan 1980 | JPX |