Patents by Inventor John D. Opfer

John D. Opfer 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).

  • Athletic speed training device using biofeedback
    Patent number: 9033855
    Abstract: An athletic training device, comprising a resilient member adapted to be worn behind a knee of a leg with at least one strap coupled to the resilient member so that the resilient member is located behind the knee. Two straps may be used where the first strap is coupled to the resilient member and securable to the leg above the knee; and the second strap coupled proximate to the first strap and securable to the leg below the knee. The strap or straps of the athletic training device are constructed of resilient flexible elastomeric material. Alternatively or additionally, the straps may be adjustable and held fast about the leg by one or more of the following: hook and loop fastener material, clips, snaps, buttons, and buckles.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: May 19, 2015
    Inventor: John D. Opfer
  • ATHLETIC SPEED TRAINING DEVICE USING BIOFEEDBACK
    Publication number: 20140005014
    Abstract: An athletic training device, comprising a resilient member adapted to be worn behind a knee of a leg with at least one strap coupled to the resilient member so that the resilient member is located behind the knee. Two straps may be used where the first strap is coupled to the resilient member and securable to the leg above the knee; and the second strap coupled proximate to the first strap and securable to the leg below the knee. The strap or straps of the athletic training device are constructed of resilient flexible elastomeric material. Alternatively or additionally, the straps may be adjustable and held fast about the leg by one or more of the following: hook and loop fastener material, clips, snaps, buttons, and buckles.
    Type: Application
    Filed: June 27, 2012
    Publication date: January 2, 2014
    Inventor: John D. Opfer