Patents Assigned to Empath Communications, Inc.
  • Apparatus for transmitting digital data
    Patent number: 4622681
    Abstract: An apparatus is disclosed for transmitting digital data by radio frequency electromagnetic radiation, wherein the radio frequency transmitter of the digital data is electrically isolated from the source of the digital data. The radio frequency transmission is accomplished by symmetrical frequency modulation of a high frequency carrier, wherein the range of the symmetrical frequency modulation is responsive to the logical level of the digital data.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: November 11, 1986
    Assignee: Empath Communications, Inc.
    Inventors: Stephen C. Snell, Thomas P. Scarinci