Patents by Inventor Stoyan I. Tcholakov

Stoyan I. Tcholakov 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).

  • Adjustable bristle toothbrush apparatus
    Patent number: 7743452
    Abstract: An adjustable bristle toothbrush apparatus which provides pneumatic bristle exposed length pressure adjustment. Bristles are provided in bristle bundles which are affixed to bristle bases. Each base moves within an individual cylinder via a slave piston. Adjustment of chamber pressure via the adjustment knob on the handle first end determines slave piston resistance to inward movement.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: June 29, 2010
    Inventor: Stoyan I. Tcholakov