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| Number | Title | Issue Date |
| 5774868 | Automatic sales promotion selection system and method An automated sales promotion selection system uses neural networks to identify promising sales promotions based on recent customer purchases. The system includes a customer information device that receives customer data relating to customer purchases of i... | 06/30/1998 |
| 5084909 | Method of processing gemstones to enhance their color Color enhanced topaz, beryl, tourmalines, quartz, diamonds and other gem material products, both natural and synthetic, and the process by which they are color-enhanced are described. In this process rough or finished gemstones of virtually any size, in p... | 01/28/1992 |
