Patents by Inventor Erwin Fehr

Erwin Fehr 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).

  • Patent number: 4717246
    Abstract: A microscope includes a stand with an upright. A generally L-shaped motion box is movable along the upright. A vertical portion of the motion box surrounds the upright, while its horizontal section provides a support for the microscope optical system. An objective is fixed to the bottom of the support. The top of the support includes a guide for an optical support carrying a binocular tube. The optical support and the binocular tube of the microscope are displaceable or movable relative to the fixed objective. With this microscope, the same point on an object can be observed with the same image quality, despite whether the object point is observed in a stereoscopic, monocular or binocular manner.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: January 5, 1988
    Assignee: Wild Heerbrugg AG
    Inventors: Erwin Fehr, Andreas Schaefer
  • Patent number: 4697893
    Abstract: A microscope includes a generally L-shaped motion box and an optical support located on a horizontal leg of the motion box. A binocular tube is fixed to the optical support. An objective changer is guided in the horizontal leg of the motion box and supports a first objective for stereoscopic observation and a second objective. The second objective is the objective of a conventional microscope. A beam splitter connected directly downstream of the second objective distributes the incident light into the two observation channels of the microscope. With this stereomicroscope, a single manipulation switches from normal stereoscopic observation to binocular observation with much greater magnification.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: October 6, 1987
    Assignee: Wild Heerbrugg AG
    Inventors: Erwin Fehr, Andreas Schaefer