Patents by Inventor Derrick Perkins, Sr.

Derrick Perkins, Sr. 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).

  • Archery broadhead with replaceable blades
    Patent number: 7410434
    Abstract: A broadhead includes a ferrule for mounting an arrowshaft, the ferrule having a locking portion. At least two blades are mounted on the ferrule (three are used in the preferred embodiment), the blades being coupled to the ferrule in their center portions by notches that mate with the locking portion of the ferrule. A locking nut is mounted on a rear portion of the ferrule for holding the three blades in place on the ferrule when the locking nut is tightened.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: August 12, 2008
    Assignee: Liberty Research Co.
    Inventor: Derrick Perkins, Sr.
  • Archery broadhead with replaceable blades
    Patent number: 6875138
    Abstract: A broadhead includes a ferrule for mounting an arrowshaft, the ferrule having a locking portion. At least two blades are mounted on the ferrule (three are used in the preferred embodiment), the blades being coupled to the ferrule in their center portions by notches that mate with the locking portion of the ferrule. A locking nut is mounted on a rear portion of the ferrule for holding the three blades in place on the ferrule when the locking nut is tightened.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: April 5, 2005
    Assignee: Liberty Research Co.
    Inventor: Derrick Perkins, Sr.