Number | Name | Date | Kind |
---|---|---|---|
4694443 | Ando | Sep 1987 | |
4725721 | Nakamura et al. | Feb 1988 | |
4888755 | Itoh | Dec 1989 | |
5073888 | Takahashi et al. | Dec 1991 | |
5084851 | Noda et al. | Jan 1992 | |
5105411 | Ishika | Apr 1992 | |
5161139 | Inoue et al. | Nov 1992 | |
5434841 | Nishikawa | Jul 1995 | |
5487058 | Kitabayashi | Jan 1996 |
Entry |
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"Optical Pickup System Point of Development." |