Patents by Inventor Dennis B. Dahlman

Dennis B. Dahlman 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).

  • Railroad communication system
    Patent number: 5039038
    Abstract: A radio communication control system for a lead unit and a plurality of remote units is disclosed. The system has a protocol for establishing a communication link between the lead unit and the one or more remote units in the system which prevents any of the units in that system from processing messages or commands from other units in other train systems or processing messages or commands originating from units within a train system which are addressed to other units within the system. The communication system also includes a communications channel contention system for minimizing the probability of multiple units transmitting on the common communication channel at the same time and for insuring that the highest priority communications in each train are transmitted first in time measured from the end of the latest transmission on the radio communications channel.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: August 13, 1991
    Assignee: Harris Corporation
    Inventors: Richard E. Nichols, Hans Scharla-Nielsen, Dale H. Delaruelle, Dennis B. Dahlman
  • Railroad communication system
    Patent number: 4582280
    Abstract: A radio communication control system for a lead unit and a plurality of remote units is disclosed. The system has a protocol for establishing a communication link between the lead unit and the one or more remote units in the system which prevents any of the units in that system from processing messages or commands from other units in other train systems or processing messages or commands originating from units within a train system which are addressed to other units within the system. The communication system also includes a communications channel contention system for minimizing the probability of multiple units transmitting on the common communication channel at the same time and for insuring that the highest priority communications in each train are transmitted first in time measured from the end of the latest transmission on the radio communications channel.
    Type: Grant
    Filed: September 14, 1983
    Date of Patent: April 15, 1986
    Assignee: Harris Corporation
    Inventors: Richard E. Nichols, Hans Scharla-Nielsen, Dale H. Delaruelle, Dennis B. Dahlman