Patents by Inventor Robert N. Stellmach

Robert N. Stellmach 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).

  • Selector adaptor for converting a cellular phone to a bag phone
    Patent number: 5423083
    Abstract: A selector adapter for a transportable cellular phone that has been converted to a bag phone including a master module which contains the circuits for alternately connecting one of a plurality of power sources to the cellular phone and a connector module for connecting the master module to the cellular phone and the power sources.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: June 6, 1995
    Inventor: Robert N. Stellmach