Patents by Inventor Douglas H. Patterson

Douglas H. Patterson 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: 4858231
    Abstract: A bus interface loading assembly used to equalize electrical loads of termination slots on a backplane assembly is disclosed. It is comprised of loading means adapted to be converted on said backplane at unused slots thereof. The loading means is also adpated to emulate a real load such that the characteristic impedance discontinuities of the backplane assembly are minimized.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: August 15, 1989
    Assignee: Northern Telecom Limited
    Inventor: Douglas H. Patterson
  • Patent number: 4731749
    Abstract: An electronic postage meter includes two non-volatile memories. One of the non-volatile memories is utilized for storing in historical sequence in respective registers the transaction information for each of a predetermined number of transactions which have occurred prior to the last transaction. This memory is accessed at the time of each transaction. The real-time transaction information may be sequentially written over the earliest information in the registers. The other non-volatile memory stores cumulative data upon power-down.
    Type: Grant
    Filed: August 22, 1984
    Date of Patent: March 15, 1988
    Assignee: Pitney Bowes Inc.
    Inventors: Wallace Kirschner, Easwaran C. N. Nambudiri, Douglas H. Patterson
  • Patent number: 4706215
    Abstract: A method and associated apparatus is provided for protecting the accounting data stored in an electronic postage meter having multiple non-volatile memories for the storage of accounting data, including the steps of and associated apparatus for providing a first non-volatile memory; writing postage transactions accounting data into the first non-volatile memory in real time during each trip cycle of the meter; providing a second non-volatile memory; writing postage transaction accounting data into the second non-volatile memory only during the power cycle of the meter; and disabling the first non-volatile memory when the meter enters a power down cycle to prevent any further writing of data into the first non-volatile memory. Advantageously, the first non-volatile memory is clamped to ground potential during the power down cycle.
    Type: Grant
    Filed: August 22, 1984
    Date of Patent: November 10, 1987
    Assignee: Pitney Bowes Inc.
    Inventors: Wallace Kirschner, Easwaran C. N. Nambudiri, Douglas H. Patterson
  • Patent number: 4627016
    Abstract: A method and associated apparatus is provided for using data stored in one non-volatile memory to locate the next memory address in which to write data in another non-volatile memory of an electronic postage meter, comprising the steps of and associated apparatus for providing a first non-volatile memory for storing data therein including cumulative piece count data corresponding to the number of completed postage transactions, providing a second non-volatile memory for storing accounting data sequentially therein for each one of a predetermined number of trip cycles of the postage meter which number corresponds to the number of individually addressable trip cycle memory locations in the second non-volatile memory and defines a modulus of the second non-volatile memory, retrieving the cumulative piece count data from the first non-volatile memory during a power up cycle, dividing the cumulative piece count data by the modulus of the second non-volatile memory, and using the remainder resulting from the divisi
    Type: Grant
    Filed: August 22, 1984
    Date of Patent: December 2, 1986
    Assignee: Pitney Bowes Inc.
    Inventors: Wallace Kirschner, Easwaran C. N. Nambudiri, Douglas H. Patterson