Patents by Inventor Puthenpurackal K. John

Puthenpurackal K. John 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 body system
    Patent number: 4715697
    Abstract: A microscope body is adapted to compensate for the deliberately introduced 0.6 percent lateral color of an infinity corrected microscope objective. This compensation of the lateral color by the microscope body is done without introducing objectionable axial color aberration. The microscope body is typically a trinocular body which provides an image to binocular eyepieces for observation by a user or alternatively to both the eyepieces and to a focal plane of a camera.
    Type: Grant
    Filed: December 9, 1985
    Date of Patent: December 29, 1987
    Assignee: Cambridge Instruments Inc.
    Inventors: Puthenpurackal K. John, Arthur H. Shoemaker