Patents by Inventor Ross Friesen

Ross Friesen 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).

  • Printhead Evacuation Mechanism And Method
    Publication number: 20080043075
    Abstract: A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.
    Type: Application
    Filed: October 29, 2007
    Publication date: February 21, 2008
    Inventors: Jeffrey Langford, Ross Friesen, Carrie Harris, Harold Mantooth, Donald Michael
  • Printhead evacuation mechanism and method
    Publication number: 20060164470
    Abstract: A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.
    Type: Application
    Filed: January 21, 2005
    Publication date: July 27, 2006
    Inventors: Jeffrey Langford, Ross Friesen, Carrie Harris, Harold Mantooth, Donald Michael