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Information storage medium and electronic device using the same

  • US 6,102,800 A
  • Filed: 06/05/1997
  • Issued: 08/15/2000
  • Est. Priority Date: 07/28/1993
  • Status: Expired due to Term
First Claim
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1. An optically readable disk shaped ROM medium for use with a game control unit having an optical image detecting sensor, said disk shaped medium comprising an area for storing a game program which is operable on said game control unit, a predetermined area of a substantially flat plane positioned to correspond with said optical image detecting sensor, and a proprietary image indication formed in said predetermined area so as to be visually recognizable as the proprietary image indication to the human eye as well as optically readable by said optical image detecting sensor to provide data indicative of the proprietary image indication.

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