Patents by Inventor Robert M. Semprini

Robert M. Semprini 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).

  • Airplane door lock system
    Patent number: 6817577
    Abstract: A door lock system for an airplane is operative to alternately operate spaced doors to provide controllable entry into a restricted area located between the spaced doors.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: November 16, 2004
    Inventor: Robert M. Semprini
  • Airplane door lock system
    Publication number: 20040089766
    Abstract: A door lock system for an airplane is operative to alternately operate spaced doors to provide controllable entry into a restricted area located between the spaced doors.
    Type: Application
    Filed: October 22, 2003
    Publication date: May 13, 2004
    Inventor: Robert M. Semprini
  • Airplane door lock system
    Patent number: 6659401
    Abstract: A door lock system for an airplane is operative to alternately operate spaced doors to provide controllable entry into a restricted area located between the spaced doors.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: December 9, 2003
    Inventor: Robert M. Semprini