Patents Assigned to Wallae Computer Services, Inc.
  • Method for preventing counterfeiting of sales receipts
    Patent number: 5209513
    Abstract: A method for preventing counterfeiting of sales receipts which involves printing at different stages of both fixed and variable information on register rolls.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: May 11, 1993
    Assignee: Wallae Computer Services, Inc.
    Inventors: Orlando C. Batelli, Michael A. Repp