Patents by Inventor Douglas A. Griswold

Douglas A. Griswold 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).

  • Aircraft adjustable control stick
    Patent number: 5769363
    Abstract: An adjustable aircraft control stick comprising a vertically-positioned column pivoted about the pitch axis for controlling the elevators and a yoke member pivotally mounted to the upper end of the control column about an axis parallel to the roll axis of the aircraft for control of the ailerons. The yoke member including a series of socket openings positioned longitudinally on the yoke and a hand grip member releasably engageable with any of said sockets to adjust for different arm length pilots.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: June 23, 1998
    Assignee: The Cessna Aircraft Company
    Inventors: Douglas A. Griswold, John I. Friesen, Jr.
  • Method of developing opaquely coated sensitized matrix with a solution containing sodium meta-silicate
    Patent number: 3998638
    Abstract: In the method of fabricating color television picture tubes, it is desirable to photo-expose and develop the exposed portions to define a phosphor matrix pattern. In such techniques an opaque coating may be deposited over the sensitized matrix coating which is to be developed. A periodate containing solution, to which is added a predetermined amount of sodium meta-silicate, is used as the developing solution to remove the sensitized matrix portions, while leaving behind the opaque light absorbing pattern on the screen substrate.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: December 21, 1976
    Assignee: Westinghouse Electric Corporation
    Inventors: Douglas A. Griswold, Harry L. Ormsby, Harold D. Wilcox