Patents by Inventor John A. Hutton

John A. Hutton 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).

  • Chair incorporating improved chairback support structure
    Patent number: 4917439
    Abstract: A chair of the four legged type with seat support rails, a seat and a back wherein rear legs, rear support rail and an inner rear support rail enclose the chair back providing strength and stability is disclosed.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: April 17, 1990
    Assignee: Donghia Furniture Co., Ltd.
    Inventor: John A. Hutton
  • Method and apparatus for determining relative phase and sensitivity of elements in an acoustic array
    Patent number: 4090169
    Abstract: Relative phase and sensitivity characteristics of individual transducer eents in a long acoustic array are determined by sequentially positioning a transmitting element in predetermined spaced relation to each array element by means of an array holding member and a trough-like spacing member that contains a known transmission medium, driving the transmitting element with a test frequency input signal that is pulsed at a predetermined repetition rate, gating the output signal from the array element under test to an oscilliscope for phase comparison with an adjustably phase shifted version of the input signal, and measuring amplitudes of both input and output signals.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: May 16, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lyles C. Adair, Willis A. Teel, Christian P. F. Werle, John A. Hutton
  • Stackable chair
    Patent number: D547961
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: August 7, 2007
    Assignee: David Sutherland, Inc.
    Inventors: John A. Hutton, legal representative, John Hutton, deceased
  • Chair
    Patent number: D338112
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: August 10, 1993
    Assignee: Donghia Furniture
    Inventor: John A. Hutton
  • Sofa
    Patent number: D338567
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: August 24, 1993
    Assignee: Donghia Furniture
    Inventor: John A. Hutton
  • Chaise
    Patent number: D339246
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: September 14, 1993
    Assignee: Donghia Furniture
    Inventor: John A. Hutton