Patents by Inventor Mark Graybill

Mark Graybill 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).

  • Method and apparatus for producing potable water from air including severely arid and hot climates
    Publication number: 20070028769
    Abstract: Methods and apparatus for extracting liquid water from ambient air, including ambient air in severely arid and hot climates, are described. An example apparatus uses a sorption-desorption-condensation cycle using a sorption wheel to extract moisture from ambient air and concentrate the water vapor driven off from the sorption material in a circulating gas, with condensation of liquid water from the circulating gas.
    Type: Application
    Filed: August 5, 2005
    Publication date: February 8, 2007
    Inventors: Dustin Eplee, Mark Graybill
  • First order recursive digital filter without multiplier
    Patent number: 4984187
    Abstract: A recursive digital filter and method for filtering an n-bit digital input signal. The filter includes a summing circuit which receives an input signal. A second summing circuit is also provided which is coupled to the first summing circuit. Further provided is a feedback circuit which is operable to allow the first and second summing circuits to generate a filtered output signal without using a multiplier.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: January 8, 1991
    Assignee: Hughes Aircraft Company
    Inventors: Mark Graybill, Allan Goetz