Patents by Inventor St. John Merrill Hall, Jr.

St. John Merrill Hall, Jr. 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).

  • Adjustable carriage apparatus
    Patent number: 3960256
    Abstract: Apparatus for a matrix printer by which the distance between the printhead and the paper being printed upon may be adjusted. The printhead is secured to a carriage whose position may be adjusted with respect to the paper by rotating a pair of bearings that are rotatably mounted in the carriage and centrally located around a stationary shaft.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: June 1, 1976
    Assignee: Digital Equipment Corporation
    Inventors: Charles Bickoff, St. John Merrill Hall, Jr.