| 摘要 |
PCT No. PCT/US88/03345 Sec. 371 Date Mar. 19, 1990 Sec. 102(e) Date Mar. 19, 1990 PCT Filed Sep. 30, 1988 PCT Pub. No. WO89/02969 PCT Pub. Date Apr. 6, 1989.A security system which employs an optical key shape reader to photoelectrically derive an electrical signal from a shape characteristic of a key is disclosed. The system provides heightened security over standard key operated systems and is particularly well suited for use in motor vehicles.
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