Patents by Inventor Donald C. Hatch

Donald C. Hatch 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).

  • Weight collar
    Patent number: 5163887
    Abstract: An improved quick release weight collar for securing removable weights on a weight bar. The collar has two connected cylindrical members integrally joined by one or more steel balls that can be locked in a first position against the bar radially and rotatably unlocked relative radially to the bar in a second position.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: November 17, 1992
    Inventor: Donald C. Hatch