Number | Date | Country | Kind |
---|---|---|---|
1-327975 | Dec 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4230914 | Korwin et al. | Oct 1980 | |
4920557 | Umemoto | Apr 1990 | |
5040204 | Sasaki et al. | Aug 1991 |
Number | Date | Country |
---|---|---|
3434686 | Apr 1986 | DEX |
0149160 | Jun 1990 | JPX |
Entry |
---|
Illegal Phone, Dak Industries Inc, Sep. 1984, p. 60. |