Patents by Inventor Mark Doherty

Mark Doherty 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: 6822511
    Abstract: Prior art architectures of power amplifiers employ a substantial die area, and utilize multiple integrated circuit technologies with a net higher manufacturing cost and large associated packaging area. A new scheme is presented wherein several sense and control signals are used to provide fine and gross control over the key figures of merit associated with integrated semiconductor power amplifiers. How and where these sense and control signals are used is crucial to achieving the most manufacturable and most economic integrated amplifier. In accordance with a first embodiment of the invention, a Dual Feedback-Low power regulation circuit for a three-stage power amplifier integrated circuit is provided. In accordance with a second embodiment of the invention, a current source feedback circuit having low RF output signal power regulation for a three-stage power amplifier integrated circuit is provided.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: November 23, 2004
    Assignee: SiGe Semiconductor Inc.
    Inventors: Mark Doherty, John Gillis, Michael McPartlin, David Helms, Phillip Antognetti
  • Patent number: 5524914
    Abstract: The tow bar and trailer hitch comprise a bracket having an attachment plate and a cylindrical sleeve which are mounted on the deck of the personal watercraft and a generally triangular rigid tow bar which has a first pin at its apex which is inserted into the sleeve to provide pivoting capability between the bracket and the front of the tow bar. A second pin or bolt is inserted through each of the legs extending from the corners of the base of the triangle and into corresponding attachment points on the underside of the trailer. The second pins also allow vertical pivoting movement between the tow bar and the trailer.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: June 11, 1996
    Assignee: D & H Products, Inc.
    Inventors: Mark Doherty, Kim Healy
  • Patent number: 5119752
    Abstract: The personal motorcraft trailer has a lower shell which is capable of flotation and planing on a body of water. An upper shell has a lip which fits over the edge of the lower shell forming a sealed pod in which gear and supplies may be stored. At least a portion of the upper shell is openably attached by a hinge. The upper shell has two recessed areas in its upper surface, the rear recessed area being deep enough for holding fuel containers and the forward recessed area being relatively shallow and concave to accept gear such as surfboards or skis which are held in place by elastic cords stretched across the gear from hooks on the sides of the upper shell. The trailer is towed behind the motorcraft by a tongue the prongs of which attach at two clips, one on either side of the lower shell. Each prong of the tongue catches under the lip at the front of the trailer to prevent the trailer from digging into the water, causing it to flip.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: June 9, 1992
    Inventor: Mark Doherty
  • Patent number: D325020
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: March 31, 1992
    Inventor: Mark Doherty
  • Patent number: D358570
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: May 23, 1995
    Assignee: D&H Products
    Inventors: Mark Doherty, Kim Healy