Patents by Inventor Sai Karthik Annapragada

Sai Karthik Annapragada 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).

  • Tennis backboard for excellent rebound and low noise
    Patent number: 9302166
    Abstract: A tennis practice device that has a rebound surface made out of composite material consisting of cement, ground calcium silica, cellulose fibers, wood fibers and other select additives such as fly ash and a sound dampening material sandwiched between the rebound surface and the support structure.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: April 5, 2016
    Inventor: Sai Karthik Annapragada
  • Tennis Backboard for Excellent Rebound and Low Noise
    Publication number: 20150190701
    Abstract: A tennis practice device that has a rebound surface made out of composite material consisting of cement, ground calcium silica, cellulose fibers, wood fibers and other select additives such as fly ash and a sound dampening material sandwiched between the rebound surface and the support structure.
    Type: Application
    Filed: January 9, 2014
    Publication date: July 9, 2015
    Inventors: Venkateswara Rao Annapragada, Sai Karthik Annapragada