Patents by Inventor Gerrit A. Van Exel

Gerrit A. Van Exel 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 display device
    Patent number: 4283872
    Abstract: An adjustable display device consisting of two or more members, for displaying relevant information when these members have been moved in specific relationships to each other. Both the relative movement and the maintenance of the specific relationships are accomplished by cuts through the thickness of one member to form integral tabs in that member to retain and guide the other member(s).
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: August 18, 1981
    Inventor: Gerrit A. Van Exel
  • Optical adjustment knob for binocular
    Patent number: 4281890
    Abstract: A binocular having a treadle-like knob which is coupled to optical elements to effect an adjustment such as focusing or varying the magnification of the optical system. The knob is mounted to be moveable in seesaw fashion about an axis which is generally perpendicular to the optical axes of the telescopes which form the binocular. This arrangement is especially useful in relatively small binoculars which may be held in one hand, the knob being driven by the tips of two fingers on the supporting hand.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: August 4, 1981
    Assignee: Bausch & Lomb Incorporated
    Inventor: Gerrit A. Van Exel
  • Optical adjustment knob with spaced apart platforms
    Patent number: 4066329
    Abstract: A center-focus binocular with a focus knob having a flattened upper surface which is easily contacted by fingertips on both hands of the user when the binocular is held in a normal viewing position. The knob motion is like that of a treadle or seesaw, and the user's finger motion is dominantly linear and opposite. The fingers of opposite hands apply opposing forces to the knob for smooth and accurate movement, and the knob is coupled to ocular lenses of the binocular through a steep cam for rapid, short-stroke focus adjustment.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: January 3, 1978
    Assignee: Bausch & Lomb Incorporated
    Inventor: Gerrit A. Van Exel
  • Calculating indicator for games, displays or the like
    Patent number: D252916
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: September 18, 1979
    Inventor: Gerrit A. Van Exel
  • Slide frame for calculator or the like
    Patent number: D254078
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: January 29, 1980
    Inventor: Gerrit A. Van Exel
  • Resilient clip for retaining removable lenses in an eyeglass frame
    Patent number: D263479
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: March 23, 1982
    Assignee: Bausch & Lomb, Incorporated
    Inventors: Gerrit A. Van Exel, Claus O. Huckenbeck
  • Calculating device for conversions or the like
    Patent number: D267412
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: December 28, 1982
    Inventor: Gerrit A. Van Exel