Patents by Inventor Roger David Keay

Roger David Keay 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: 5802173
    Abstract: A multichannel radiotelephony system provides two way cordless communications with a plurality of multichannel transceivers portable within a coverage area comprised by a plurality of cells, each associated with a base station and antennas, such as to permit channel frequency reuse in cells within the coverage area. For at least part of the coverage area, the locations of the antennas within the cells and the locations of the base stations are independently mapped, the antennas being associated with active antenna systems and the active antenna systems being connected to the base stations utilizing broadband transmission by means of a fixed bi-directional signal distribution network. The network is connected to the base stations and the antenna systems through suitable interfaces incorporating frequency translation so that available frequency bands in the signal distribution network which will normally be shared with other services, may be utilised. Plural base stations may be co-located.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: September 1, 1998
    Assignee: Rogers Cable Systems Limited
    Inventors: Nicholas Francis Hamilton-Piercy, Donald Graham Monteith, Roger David Keay, George Maynard Hart, Meng Yee, Peter Oldfield, Philip Leighton, Edward O'Leary