Patents by Inventor John T. Armbruster

John T. Armbruster 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).

  • Microscope vertical fluorescent illuminator
    Patent number: D242790
    Type: Grant
    Filed: February 19, 1976
    Date of Patent: December 21, 1976
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Multi-viewing microscope attachment
    Patent number: D242791
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: December 21, 1976
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Cabinet for a water bath shaker
    Patent number: D244711
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: June 14, 1977
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Ophthalmic instrument control board
    Patent number: D245863
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: September 20, 1977
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Optometer
    Patent number: D245917
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: September 27, 1977
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Dual viewer attachment for a microscope
    Patent number: D247245
    Type: Grant
    Filed: February 24, 1976
    Date of Patent: February 14, 1978
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Drawing attachment for a microscope
    Patent number: D250412
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: November 28, 1978
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Refractometer
    Patent number: D253909
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: January 8, 1980
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Body of a tissue culture microscope
    Patent number: D257357
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Body and illuminator of a tissue culture microscope
    Patent number: D257358
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Bilirubin concentration analyzer
    Patent number: D261033
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 29, 1981
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Medical instrument housing
    Patent number: D261034
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 29, 1981
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Bilirubinometer
    Patent number: D261173
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: October 6, 1981
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Microscope
    Patent number: D273592
    Type: Grant
    Filed: August 26, 1981
    Date of Patent: April 24, 1984
    Assignee: Warner Lambert Technologies, Inc.
    Inventor: John T. Armbruster