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  • Inventor(s):
    James L. Massey
    Patent Number:
    US 3402393
    Description:

    Digital error correcting coding techniques involving the sensing of conditions under which the decoder is operating. In one aspect a monitoring device counts the ones in the decoding decision and in certain parity checks corrected by those decisions. In another aspect the code is supplemented such that one actual decoding error can create a number of apparent errors or ones, which enables early detection of conditions beyond the capability of the decoder. In another aspect fades are detected …

    Date Issued:
    1968-09-17
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    James L. Massey
    Patent Number:
    US 3429334
    Description:

    Device for correcting or detecting errors in transmission of signal information, having an information signal memory, an adder for forming redundancy signals from connections between the adder and the memory in accordance with a convolutional code, the device constructed to enable backward or forward decoding of the message.

    Date Issued:
    1969-04-15
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    James L. Massey
    Patent Number:
    US 3303333
    Description:

    This invention relates to methods of and aparatus for processing signal information and, more particularly, to the correcting and/or detecting of signal errors or other changes, as produced in transmission.

    Date Issued:
    1967-02-07
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    James L. Massey
    Patent Number:
    US 3566352
    Description:

    Error correction in convolutionally coded messages, using a plurality of information digit streams and a single parity digital stream with each information digit being included as a component in the defining summation for exactly two parity digits spaced apart by a certain number of time intervals (a time interval being defined to include a digit from each stream), the time interval spacing between the two parity digits being the same for each information digit in a given stream but different…

    Date Issued:
    1971-02-23
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    James L. Massey
    Patent Number:
    US 3500320
    Description:

    Bursts of errors in convolutionally coded messages are corrected by a decoder in which a parity checking circuit determines whether selected syndrome digits which lie within the constraint length of the code form a codeword in a linear block code having as its codewords the set of all patterns of said selected syndrome digits that are consistent with any error burst pattern confined to the beginning of said constraint length and upon the presence of such a codeword, error detecting and correc…

    Date Issued:
    1970-03-10
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Abhay Kumar, Paul W. Futa, Jr., Steven F. Fisher
    Patent Number:
    US 6328056 B2
    Description:

    An unbalance compensated bypass valve (14, 21, 23) for a gas turbine engine fuel supply system is responsive to the fuel pressure differential across a fuel metering valve (15) to open and close a bypass orifice (37, 39, 41; 89, 91, 93; 99, 101, 103). The bypass valve (14, 21, 23) selectively supplies high fuel pressure to a compensating cavity (45, 95, 120) providing a counterbalancing force against an annular area (47, 97, 124) of the bypass valve piston (34, 81, 83, 111, 112) to compensate…

    Date Issued:
    2001-12-11
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    James J. Carberry, Charles Benjamin Alcock
    Patent Number:
    US 5286698 B2
    Description:

    Solid oxide solutions of the formula La.sub.1-x Sr.sub.x CrO.sub.3-.differential. have been found to exhibit surprisingly high specific activity as catalysts for oxidation and hydrogenation reactions. The oxide solutions can be utilized in particulate form or applied as films to the surfaces of refractory substrates. The oxide solution catalysts are expected to be a viable alternative to the noble metal catalysts now used commercially for treatment of combustion chamber exhaust gases to reduc…

    Date Issued:
    1994-02-15
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Arthur H. Hale, Peringandoor R. Hariharan, Sanjit Roy
    Patent Number:
    US 5637795 B2
    Description:

    A novel process and apparatus have been contrived for the study of the bit/stabilizer balling phenomenon in the laboratory. The device permits a standard testing procedure using a specially designed bob simulating the drill bit for comparing degrees of balling for different rock formations under different drilling conditions involving variable and controlled parameters like weight-on-bit, revolutions-per-minute (rpm), drilling fluids, etc.

    Date Issued:
    1997-06-10
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Joan F. Brennecke, Edward J. Maginn
    Patent Number:
    US 6579343 B2
    Description:

    The present invention provides a method for purifying a gas by contacting the gas with a liquid ionic compound. Natural gas may be purified, removing water and carbon dioxide, by contacting the natural gas with a liquid ionic compound.

    Date Issued:
    2003-06-17
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Paul J. McGinn, Hongmei An
    Patent Number:
    US 8356475 B2
    Description:

    Described is a method of slowly releasing a catalyst for, inter alia, the purpose of soot oxidation in a particulate filter. An example method includes incorporating an alkali metal oxide in a glass. Slow leaching of the alkali from the glass provides a means to gradually deliver the catalyst over extended periods. Additionally, the example method includes increasing the amount of alkaline metal ions that may be leached from the glass.

    Date Issued:
    2013-01-22
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Patrick Fay, Ning Su
    Patent Number:
    US 8592859 B2
    Description:

    Example methods and apparatus for Antimonide-based backward diode millimeter-wave detectors are disclosed. A disclosed example backward diode includes a cathode layer adjacent to a first side of a non-uniform doping profile, and an Antimonide tunnel barrier layer adjacent to a second side of the spacer layer.

    Date Issued:
    2013-11-26
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Kai Zeng, Charles A. Bouman, Bruno Kristiaan Bernard De Man, Jiang Hsieh, Ken D. Sauer, Jean-Baptiste Thibault, Zhou Yu
    Patent Number:
    US 8655033 B2
    Description:

    An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a plurality of detectors of the provided projection data, reconstructing portions of the first image with the plurality of enlarged voxels or detecto…

    Date Issued:
    2014-02-18
    Record Visibility:
    Public
    Resource Type
    Patent