Patents by Inventor Melvyn Dixon

Melvyn Dixon 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).

  • Polarization insensitive optical communication device utilizing optical preamplification
    Patent number: 4900917
    Abstract: A polarization insensitive optical device is disclosed which is capable of providing direct optical amplification of an input signal of unknown (and possibly varying) polarization. A polarization diversity technique is utilized wherein a polarization beam splitter is used to divide the incoming signal into orthogonal components of known polarization (TE,TM). The orthogonal components are then separately amplified, using a semiconductor laser as the amplifying device. The amplified components are then recombined, either optically or electrically, to form the final output signal.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: February 13, 1990
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Melvyn Dixon, Nils A. Olsson, Robert E. Tench, Liang Tzeng
  • Fabrication of ferrite material
    Patent number: 4247500
    Abstract: A method of fabricating ferrite material which results in high permeability and/or fast thruputs. Binder systems are employed such that the components burn out completely and sequentially during sintering and result in the proper grain size and surface properties for high permeability in the ferrite material. In particular, the binder system comprises polyvinyl alcohol, polyvinyl pyrrolidone and methyl cellulose.
    Type: Grant
    Filed: December 7, 1979
    Date of Patent: January 27, 1981
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Melvyn Dixon, Bhaskar B. Ghate, Ronald J. A. Holmes, Curtis E. Pass