Patents by Inventor John David Crow

John David Crow 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: 4079404
    Abstract: An optical assembly structure wherein miniature optical components such as lasers, modulators, lenses, thin-film and fiber-optic waveguides, and photodetectors are critically aligned and supported for coactive operation by means of two or more wafers which are formed with complementary grooves and mortises to support the loose optical components such as lenses and fiber-optic waveguides and to receive alignment rails to insure the relativity of the wafers, which also have formed integral therewith optical elements such as waveguides, modulators, and lasers, to produce an integrated optical assembly somewhat in the manner of an "optical bench," wherein the bench structure also provides an active optical element.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: March 14, 1978
    Assignee: International Business Machines Corporation
    Inventors: Liam David Comerford, John David Crow, Robert Allan Laff, Eric Gung-Hwa Lean, Michael John Brady
  • Patent number: 3994559
    Abstract: An optical structure for the bidirectional coupling of light between each of a multiplicity of optical fibers and corresponding individual thin-film waveguides to achieve a leaky wave coupling from one guided mode structure to a second guided mode structure. The structure is particularly suited for fabrication by planar deposition and etching techniques and features the precise axial alignment of the optical elements by inserting the fibers in etched V-grooves in the substrate upon which are deposited the waveguides.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: November 30, 1976
    Assignee: International Business Machines Corporation
    Inventors: John David Crow, Eric Gung-Hwa Lean