Patents by Inventor David Biggins

David Biggins 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).

  • Combination ophthalmic instrument
    Publication number: 20060084856
    Abstract: A combination ophthalmic instrument comprises a non-contact measurement system and a contact measurement system for measuring parameters of the eye. Measurement values from both systems are presented on a display of the instrument. A measurement value generated by one of the systems is automatically adjusted based on a measurement value generated by the other system in accordance with stored correction information.
    Type: Application
    Filed: October 20, 2004
    Publication date: April 20, 2006
    Inventors: David Biggins, Donald Miller
  • Ophthalmic refractor having retrofittable readout illumination
    Patent number: 6666555
    Abstract: A subjective ophthalmic refractor is improved for operator visibility in a darkened examination room by forming a cylinder axis scale of the refractor as a light-transmitting component having opaque scale gradations and installing a polar array of illumination sources to project light through the cylinder axis scale, which preferably includes a translucent material for diffuse illumination. In an alternative embodiment, the cylinder axis scale includes a photoluminescent material to which the scale gradations are applied. The refractor is further improved by installing respective illumination sources near a cylinder power readout and a sphere power readout of the refractor. The disclosure additionally relates to a method for retrofitting an ophthalmic refractor to illuminate the cylinder axis scale, cylinder power readout, and sphere power readout.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: December 23, 2003
    Assignee: Reichert, Inc.
    Inventors: David Biggins, Douglas H. Hoover, Carl E. Hynes, Donald E. Miller
  • Ophthalmic refractor having retrofittable readout illumination
    Publication number: 20030090630
    Abstract: A subjective ophthalmic refractor is improved for operator visibility in a darkened examination room by forming a cylinder axis scale of the refractor as a light-transmitting component having opaque scale gradations and installing a polar array of illumination sources to project light through the cylinder axis scale, which preferably includes a translucent material for diffuse illumination. In an alternative embodiment, the cylinder axis scale includes a photoluminescent material to which the scale gradations are applied. The refractor is further improved by installing respective illumination sources near a cylinder power readout and a sphere power readout of the refractor. The disclosure additionally relates to a method for retrofitting an ophthalmic refractor to illuminate the cylinder axis scale, cylinder power readout, and sphere power readout.
    Type: Application
    Filed: November 9, 2001
    Publication date: May 15, 2003
    Applicant: Leica Microsystems Inc.
    Inventors: David Biggins, Douglas H. Hoover, Carl E. Hynes, Donald E. Miller