Patents by Inventor Frank L. Calvin

Frank L. Calvin 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).

  • Wall unit for use with flex bands and resistance bands
    Patent number: D607519
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: January 5, 2010
    Inventor: Frank L. Calvin
  • Set of exercise fixture
    Patent number: D651670
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: January 3, 2012
    Inventor: Frank L. Calvin
  • Set of exercise fixtures
    Patent number: D691220
    Type: Grant
    Filed: October 7, 2012
    Date of Patent: October 8, 2013
    Inventor: Frank L. Calvin
  • Exercise harness
    Patent number: D698877
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: February 4, 2014
    Inventor: Frank L. Calvin