Patents by Inventor Walter J. C. Cook

Walter J. C. Cook 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: 5848835
    Abstract: A conveniently detachable lighted-magnifier accessory for use with a high-brightness, focusable-beam flashlight, that provides true coaxial illumination for shadow-free viewing of a wide variety of subject matter as well as to the bottom of small holes, is disclosed. Light from an attachable flashlight is reflected by a beamsplitter onto the subject matter. An observer views the illuminated subject matter through a beamsplitter through a magnifying lens or clear window.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: December 15, 1998
    Inventor: Walter J. C. Cook
  • Patent number: 4723554
    Abstract: A new type of infrared reflectance device is disclosed to provide a quantitative evaluation of skin pallor. The instrument is designed to produce a measurement proportional to the percentage of infrared reflectance of the skin. In one embodiment, it consists of a miniature GaAs light emitting diode, which provides a pulsed infrared light source, a silicon photodiode detector, and processing circuitry. The device electronics are temperature compensated and are designed to respond only to the pulsed component of the detector output and to reject components due to stray light from external sources. The wavelength is chosen such that the measurement is relatively insensitive to the level of blood oxygenation and melanin pigment in the skin.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: February 9, 1988
    Assignee: Massachusetts Institute of Technology
    Inventors: Charles M. Oman, Walter J. C. Cook