Patents by Inventor Edward J. Zakrzewski

Edward J. Zakrzewski 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).

  • Air traffic surveillance and communication system
    Patent number: 5798726
    Abstract: Air traffic surveillance and communication system for air traffic controllers includes a plurality of ground based first digital radio transceivers, each first digital radio transceiver being located in specific geographic sectors, respectively, and having a first frequency channel for supporting party-line digital voice, and a second frequency channel dedicated to supporting a digital data channel for down-linking dependent surveillance data and for both up-link and down-link data communications. The first and second frequency channels are paired such that each time a frequency change is commanded by the ground both the first and second frequency channels will be automatically tuned to a new air-ground frequency pair.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: August 25, 1998
    Assignee: Stanford Telecommunications, Inc.
    Inventors: Leonard Schuchman, Ronald Bruno, John Kefaliotis, Steve Greenberg, Edward J. Zakrzewski
  • Air traffic surveillance and communication system
    Patent number: 5459469
    Abstract: An air traffic surveillance and communication system for air traffic controllers, includes a plurality of ground based first radio transceivers located in specific geographic sectors, respectively, and having a first frequency channel for supporting party-line digital voice and a second frequency channel dedicated to supporting a digital data channel for down-linking dependent surveillance data and for both up-link and down-link data communications. The first and second frequency channels are paired such that each time a frequency change is commanded by the ground both the first and second frequency channels will be automatically tuned to a new air-ground frequency paid. The system also includes a plurality of aircraft based second digital radio transceivers, one located in each aircraft. Each second radio transceiver has corresponding first and second frequency channels and a navigational data source on each aircraft.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: October 17, 1995
    Assignee: Stanford Telecommunications, Inc.
    Inventors: Leonard Schuchman, Ronald C. Bruno, John Kefaliotis, Steve Greenberg, Edward J. Zakrzewski