Patents by Inventor Pieter A. Vlaar

Pieter A. Vlaar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Information-encrypting device and method
    Patent number: 5321755
    Abstract: A method of encrypting a sequence of characters such as a code number on an information slide or disc is provided. The method allows the encryption of a plurality of sequences on a single user-markable disc or slide which may be deciphered by a reference to a single code word.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: June 14, 1994
    Assignee: The Megaprint Group Ltd.
    Inventor: Pieter A. Vlaar