发明名称 |
Optically readable disc with a centering member fixed to a transparent substrate |
摘要 |
A transparent substrate has an information layer on an entirely flat side, and a centering member on the other side adapted to cooperate with a centering device of an apparatus for inscribing and/or reading the disc. The centering member may be glued in place and have an aperture for engagement by an apparatus spindle.
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申请公布号 |
US4899329(A) |
申请公布日期 |
1990.02.06 |
申请号 |
US19830490801 |
申请日期 |
1983.05.02 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
SLEEGERS, FRANCISCUS T.;SCHUITMAKER, PIETER D.;JANSSEN, PETER J. M. |
分类号 |
G11B3/61;G11B7/24;G11B23/00 |
主分类号 |
G11B3/61 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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