Number | Date | Country | Kind |
---|---|---|---|
63-227009 | Sep 1988 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4773053 | Gottfried | Sep 1988 | |
4804835 | Ando | Feb 1989 |
Number | Date | Country |
---|---|---|
62226454 | Oct 1987 | JPX |
Entry |
---|
Trichepps WS86 Chapt. V Optical Head and Data Reproducing Property (pp. 81-95) p. 93 by Sanyo Electric Motors, Ltd. |