Patents by Inventor Robert B. Ennenga

Robert B. Ennenga 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).

  • Radio frequency multiplexer for coupling antennas to AM/FM, CB, and television apparatus
    Patent number: 7884684
    Abstract: A multiplexer circuit for CB, AM/FM, and television splits the radio and television signals, adding impedance to the split lines, and providing an amplifier upstream of the split.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: February 8, 2011
    Assignee: R.A. Miller Industries, Inc.
    Inventors: Glen J. Seward, Robert B. Ennenga, Paul E. Miller
  • Combined AM/FM/cellular telephone antenna system
    Patent number: 5668564
    Abstract: A combined AM/FM/cellular telephone antenna system comprises a coaxial cable with an upper portion of the inner conductor of the coaxial cable and an adjacent section of the coaxial cable together forming a cellular telephone dipole antenna. The coaxial cable forms a transmission line connecting the cellular dipole antenna to cellular telephone equipment. The outer conductor of a portion of the coaxial cable below the cellular dipole antenna serves as the AM/FM antenna. The combined antenna is encaged in a fiberglass housing and mounted on a metallic base having an upper shell and a lower shell. The upper shell is electrically connected to the outer conductor of the coaxial cable forming the antenna and the lower shell is connected to a ground plane. A coaxial cable having a center conductor connected to the upper shell and an outer conductor connected to the lower shield provides connection to AM/FM receiver equipment.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: September 16, 1997
    Assignee: R.A. Miller Industries, Inc.
    Inventors: Glen J. Seward, Robert M. Lynas, Paul E. Miller, Robert B. Ennenga