Patents Assigned to 4-Valves, LLC
  • Breather valve assembly for use in engine cylinder head
    Patent number: 9534521
    Abstract: This invention relates generally to a breather valve assembly for use in an engine cylinder head.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: January 3, 2017
    Assignee: 4-Valves, LLC
    Inventor: Richard P. MacCoon