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Serial number mask and check digit for electronic registration system (ERS)

  • US 6,947,941 B1
  • Filed: 04/10/2000
  • Issued: 09/20/2005
  • Est. Priority Date: 10/14/1999
  • Status: Expired due to Term
First Claim
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1. A method of reducing improper returns of consumer products, the method comprising:

  • receiving serial number formats of the consumer products;

    defining serial number masks that characterize the serial number formats, respectively;

    providing the serial number masks with at least a first character that describes variables of the serial number format;

    storing a product registration program that effects storing and maintenance of a product registration database at a time of product purchase in accordance with the serial number masks; and

    providing the serial number mask with a second character that describes a check digit of the serial number format.

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