Patents Represented by Attorney Walter W. Karnstein

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  • Fuel supply for a fuel cell
    Patent number: 6924054
    Abstract: The present invention concerns a fuel supply for a fuel cell. The fuel supply includes a fuel storage area configured to hold a fuel solution, a fuel solution outlet configured to pass the fuel solution from the fuel storage area, a waste storage area, a waste inlet configured to pass waste into the waste storage area, and a movable barrier separating the fuel storage area and the waste storage area. The movable barrier is configured to move as fuel solution is passed from the fuel storage area and waste solution is passed into the waste storage area to simultaneously decrease the volume of the fuel storage area and increase the volume of the waste storage area.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: August 2, 2005
    Assignee: Hewlett-Packard Development Company L.P.
    Inventors: Ravi Prasad, Qin Liu, Loren E. Johnson, Michael L. Bullock, Winthrop D. Childers, L. Chris Mann, Joseph W. Tsang
  • Pipe flashing
    Patent number: D585968
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: February 3, 2009
    Assignee: West Coast Washers, Inc.
    Inventors: Alan R. Elkins, Douglas P. Elkins
  • Fluidic dispense device
    Patent number: D655423
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: March 6, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jeffrey A Nielsen, Christie Dudenhoefer, James Hankins, Mark W Woodruff, Robert Moline, Kenneth Duda, Darrel E Pozzesi, Matthew C Still
  • Battery pack
    Patent number: D668217
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 2, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin E Swier, Jeffrey Mabeck, Neel Banerjee, Peter S Nyholm