Patents by Inventor Phillip Andrew Wolstoncroft

Phillip Andrew Wolstoncroft 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).

  • Coin discriminator
    Patent number: 5833042
    Abstract: A method of categorizing coins/tokens by energizing detect coils with a single pulse detecting the back EMF curve of the decaying pulse information, analyzing the unmodified back EMF curve to extract therefrom a number of variables and processing those variables to provide values proportional to the variables, and comparing the values of the coin/token to at least one of a number of reference values to determine into which of a number of predetermined categories the coin/token falls.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: November 10, 1998
    Assignee: Microsystem Controls Pty Ltd
    Inventors: Alexander Baitch, Lawrence Peter Phillips, Norman Raymond Malzard, Phillip Andrew Wolstoncroft, Nikola Korecki