Patents by Inventor Anura J. Karunamuni

Anura J. Karunamuni 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).

  • Patent number: 6196847
    Abstract: The present invention is an apparatus and method of educating the fundamentals of numbers and/or mathematics. The apparatus is designed to replicate mathematical problems appearing on books and other media and includes a base having a front surface. This front surface includes a plurality of recesses, oriented in a column fashion. Each column represents the one's, ten's, and hundred's. The recesses receive numerical plates which are sized according to the specific column. An operator recess for receiving an operator plate is also provided to enable mathematical process to be performed by a user.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: March 6, 2001
    Inventor: Anura J. Karunamuni