Patents by Inventor David C. Johanson

David C. Johanson 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).

  • Visual field perimeter and psychomotor tracking performance measuring apparatus
    Patent number: 4421393
    Abstract: A system for evaluating tolerance to high acceleration as a function of visual field perimeter and psychomotor tracking ability. A semicircular array of light-emitting diodes (LED's) subtend the lateral field of view of a subject. Pairs of opposed LED's are sequentially illuminated inwardly or outwardly at a programmed rate. A control stick manipulated by the subject provides a nulling signal for maintaining a desired pair of LED's illuminated.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: December 20, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Malcolm M. Cohen, James J. Palumbo, David C. Johanson, John G. Nelson