Patents by Inventor Charles Clausen

Charles Clausen 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: 8101973
    Abstract: A heterojunction bipolar transistor comprising a substrate; a collector on the substrate; a base layer on the collector; an emitter layer on the base layer; the emitter layer comprising an upper emitter layer and a lower emitter layer between the upper emitter layer and base; the collector, base and emitter layers being npn or pnp doped respectively; characterized in that the lower emitter layer has a larger bandgap than the base layer and is AlxIn1-xP or GaxAl1-xP, x being in the range 0+ to 1.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 24, 2012
    Assignee: RFMD (UK) Limited
    Inventors: Matthew Francis O'Keefe, Robert Grey, Michael Charles Clausen, Richard Alun Davies
  • Patent number: 8047583
    Abstract: A handle for use in operating a door of an aircraft. The handle is fixed to a shaft and rotates the shaft about an axis. The handle includes multiple separately movable sections, the sections arranged so that each section has a limited range of movement separate from the other. The handle is capable of operating the door when the sections are moved substantially in unison. The handle also provides positive actuation of movable door components.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: November 1, 2011
    Assignee: B/E Aerospace, Inc.
    Inventor: Charles Clausen
  • Patent number: 7868356
    Abstract: A III-V field effect transistor comprising a semiconductor channel layer having an electrically conducting channel; an ohmic contact layer on the semiconductor channel layer, the ohmic contact layer having a recess structure disposed therethrough to the semiconductor channel layer; the bottom of the ohmic contact layer comprising an etch stop layer comprising Aluminium and Phosphorous and defining the shape of the recess at its junction with the semiconductor channel layer.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: January 11, 2011
    Assignee: Filtronic PLC
    Inventors: Matthew Francis O'Keefe, Michael Charles Clausen, Richard Alun Davies, Robert Grey
  • Patent number: 7735199
    Abstract: A hinge assembly for use with a door, in particular, an aircraft door, that enables the door to remain substantially parallel to the fuselage of the aircraft when the door is open and closed. The hinge assembly includes a door support assembly that couples to the door, and a hinge arm assembly. The hinge arm assembly includes a first gear assembly that couples to the fuselage, a second gear assembly that couples the hinge arm assembly to the door support assembly, and a linkage assembly coupled to the first and second gear assemblies. The first and second gear assemblies and linkage assembly cooperate to move the door support assembly and hinge arm assembly with respect to each other.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: June 15, 2010
    Assignee: B/E Aerospace, Inc.
    Inventors: Charles Clausen, Jeff Feathers, Andrew Keleher
  • Publication number: 20090261382
    Abstract: A III-V field effect transistor comprising a semiconductor channel layer having an electrically conducting channel; an ohmic contact layer on the semiconductor channel layer, the ohmic contact layer having a recess structure disposed therethrough to the semiconductor channel layer; the bottom of the ohmic contact layer comprising an etch stop layer comprising Aluminium and Phosphorous and defining the shape of the recess at its junction with the semiconductor channel layer.
    Type: Application
    Filed: April 30, 2009
    Publication date: October 22, 2009
    Applicant: FILTRONIC PLC
    Inventors: Matthew Francis O'Keefe, Michael Charles Clausen, Richard Alun Davies, Robert Grey
  • Patent number: 7538365
    Abstract: A III-V field effect transistor includes a semiconductor channel layer having an electrically conducting channel and an ohmic contact layer on the semiconductor channel layer. The ohmic contact layer has a recess structure disposed therethrough to the semiconductor channel layer. The bottom of the ohmic contact layer includes an etch stop layer including Aluminum and Phosphorous and defining the shape of the recess at its junction with the semiconductor channel layer.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: May 26, 2009
    Assignee: Filtronic PLC
    Inventors: Matthew Francis O'Keefe, Michael Charles Clausen, Richard Alun Davies, Robert Grey
  • Publication number: 20090108133
    Abstract: A handle for use in operating a door of an aircraft. The handle is fixed to a shaft and rotates the shaft about an axis. The handle includes multiple separately movable sections, the sections arranged so that each section has a limited range of movement separate from the other. The handle is capable of operating the door when the sections are moved substantially in unison. The handle also provides positive actuation of movable door components.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 30, 2009
    Applicant: B/E Aerospace, Inc.
    Inventor: Charles Clausen
  • Publication number: 20080276428
    Abstract: A hinge assembly for use with a door, in particular, an aircraft door, that enables the door to remain substantially parallel to the fuselage of the aircraft when the door is open and closed. The hinge assembly includes a door support assembly that couples to the door, and a hinge arm assembly. The hinge arm assembly includes a first gear assembly that couples to the fuselage, a second gear assembly that couples the hinge arm assembly to the door support assembly, and a linkage assembly coupled to the first and second gear assemblies. The first and second gear assemblies and linkage assembly cooperate to move the door support assembly and hinge arm assembly with respect to each other to maintain the door substantially parallel to the aircraft when moving the door toward an open position.
    Type: Application
    Filed: May 9, 2008
    Publication date: November 13, 2008
    Applicant: B/E Aerospace, Inc.
    Inventors: Charles Clausen, Jeff Feathers, Andrew Keleher
  • Publication number: 20080237643
    Abstract: A heterojunction bipolar transistor comprising a substrate; a collector on the substrate; a base layer on the collector; an emitter layer on the base layer; the emitter layer comprising an upper emitter layer and a lower emitter layer between the upper emitter layer and base; the collector, base and emitter layers being npn or pnp doped respectively; characterised in that the lower emitter layer has a larger bandgap than the base layer and is AlxIn1-xP or GaxAl1-xP, x being in the range 0+ to 1.
    Type: Application
    Filed: March 27, 2008
    Publication date: October 2, 2008
    Applicant: FITRONIC COMPOUND SEMICONDUCTORS LIMITED
    Inventors: Matthew Francis O'Keefe, Robert Grey, Michael Charles Clausen, Richard Alun Davies
  • Publication number: 20080153303
    Abstract: A III-V field effect transistor comprising a semiconductor channel layer having an electrically conducting channel; an ohmic contact layer on the semiconductor channel layer, the ohmic contact layer having a recess structure disposed therethrough to the semiconductor channel layer; the bottom of the ohmic contact layer comprising an etch stop layer comprising Aluminium and Phosphorous and defining the shape of the recess at its junction with the semiconductor channel layer.
    Type: Application
    Filed: March 7, 2008
    Publication date: June 26, 2008
    Applicant: FILTRONIC PLC
    Inventors: Matthew Francis O'Keefe, Michael Charles Clausen, Richard Alun Davies, Robert Grey