Patents by Inventor Dennis McDuffee

Dennis McDuffee 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: 6002945
    Abstract: The present invention features a radio frequency two-way electronic communications device incorporating the features of both a mobile pager and a cellular telephone. The combined mobile pager and cellular phone is packaged in a miniature, rectangular package similar to a standard mobile pager. The package, which may be clipped to a user's belt, features a top display for ease of viewing while the device is in its intended position on a user's belt. A single transducer functions a both an earphone and as a speaker allowing for a speakerphone mode of operation. A flexible, slidable mouthpiece extension to which a thin microphone is attached, is normally stored within the package. An accessible switch selects one of the modes of annunciation: ringing, beeping, or vibrating. Recessed buttons on the face of the package provide both control and dialing functions. The antenna for receiving and transmitting for both the pager and telephone functions is self-contained.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: December 14, 1999
    Inventor: Dennis McDuffee