Patents by Inventor Darren Patrick Chermack

Darren Patrick Chermack 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).

  • Dumbbell adjustable in weight
    Patent number: 7090625
    Abstract: An adjustable dumbbell featuring a handle containing an internal selection mechanism within series of nested weight units. The selection device is operated by a single action, in this case by turning a knob, which extends or retracts bars contained in the handle to attach a desired number of weight units to the handle.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: August 15, 2006
    Inventor: Darren Patrick Chermack