Patents by Inventor John R. Parker

John R. Parker 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).

  • Dielectric resonator demultiplexer with MIC circulators located within the support structure
    Patent number: 5493258
    Abstract: A dielectric resonator demultiplexer including at least one dielectric resonator filter including a plurality of cascaded dielectric resonators; and a support member on a surface of which the said at least one filter is vertically mounted with the longitudinal axis thereof substantially vertical to the mounting surface.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: February 20, 1996
    Assignee: Matra Marconi Space UK Limited
    Inventor: John R. Parker
  • Apparatus for managing an element manager for a telecommunications switch
    Patent number: 5483585
    Abstract: A public telecommunications system includes a local exchange 10, an element manger 11 for managing the exchange 10 and a configuration manager 12 for managing the element manager 11. The element manager 11 is located with the exchange 10 and the configuration manger 12 is situated at a distant location. The exchange 10, element manager 11 and configuration manager 12 are connected by communication links 18, 19. In order to provide a new or existing customer with basic telephony services or one or more supplementary services such as call forwarding, the configuration manager 12 sends an appropriate set of requests to the element manager 11. If one or more of the requests are not successfully performed in the element manager 11, the configuration manger 12 sends further requests to the element manager 11 to cancel the requests which have been successfully performed and thereby return the element manager 11 to its original configuration.
    Type: Grant
    Filed: February 10, 1994
    Date of Patent: January 9, 1996
    Assignee: British Telecommunications, plc
    Inventors: John R. Parker, Nigel T. Lever, Philip Rutter, Timothy R. Fulcher
  • Pre-activated proteins for labelling oligonucleotide probes
    Patent number: 5441867
    Abstract: Pre-activated stable protein reagents are provided. The reagents can be made by reaction of the protein and a heterobifunctional linker and have extended stability especially after lyophilisation. The reagents can be used in assay kits to form conjugates with proteins e.g. antibodies or polynucleotides e.g. oligonucleotides probes.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: August 15, 1995
    Assignee: Zeneca Limited
    Inventors: Andrew J. Garman, John R. Parker
  • Purification of opal and opal oleate to remove aniline
    Patent number: 5125975
    Abstract: Opal and opal oleate with aniline contents of less than 500 parts per million are prepared by dissolving opal in sulfuric acid and recrystallizing. The recrystallized opal is converted to opal oleate using oleic acid. The opal oleate with low aniline content finds application in the specialty colorants field.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: June 30, 1992
    Inventors: Anand Sharangpani, Joseph D. Maciejewski, John R. Parker
  • Tapered plate lug for cast-on post collection bars
    Patent number: 4160071
    Abstract: A wedge-shaped end on the lug of a secondary battery plate grid which is about three-quarters inserted in the molten lead in a post collector bar mold of an automatic cast-on machine for casting this lug integrally with a plurality of lugs of other lead plate grids. The capillary action of the molten lead fills the unimmersed parts of wedge-shaped ends of the lugs to produce integral bridges of substantially uniform rectangular cross-section between the plate grids and the collector bar.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: July 3, 1979
    Assignee: Barrett Battery, Inc.
    Inventor: John R. Parker