Patents by Inventor Ronald R. Erlendson

Ronald R. Erlendson 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).

  • Head band with nape strap
    Patent number: 4263679
    Abstract: A head band for a hard hat and including a nape strap of a material conforming to the head and held away from the head band against the nape area by two stiff strut members.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: April 28, 1981
    Inventor: Ronald R. Erlendson
  • Mechanical writing device
    Patent number: D286549
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: November 4, 1986
    Inventor: Ronald R. Erlendson