Patents by Inventor David Z. Chen

David Z. Chen 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).

  • Publication number: 20100092697
    Abstract: One embodiment provides an apparatus for material deposition. The apparatus includes a reaction chamber, and a pair of susceptors. Each susceptor has a front side and a back side, and the front side mounts substrates. The susceptors are positioned vertically in such a way that the front sides of the susceptors face each other, and the vertical edges of the susceptors are in contact with each other, thereby forming a substantially enclosed narrow channel between the substrates. The apparatus also includes a number of gas nozzles for injecting reaction gases. The gas nozzles are controlled in such a way that gas flow directions inside the chamber can be alternated, thereby facilitating uniform material deposition. The apparatus includes a number of heating units situated outside the reaction chamber. The heating units are arranged in such a way that they radiate heat energy directly to the back sides of the susceptors.
    Type: Application
    Filed: January 16, 2009
    Publication date: April 15, 2010
    Applicant: SIERRA SOLAR POWER, INC.
    Inventors: Steve Poppe, Yan Rozenzon, David Z. Chen, Xiaole Yan, Peijun Ding, Zheng Xu
  • Publication number: 20100086259
    Abstract: A system may include a housing and a patch panel located within the housing. The patch panel may include a connection plate, and a matrix of fiber connectors connected to the connection plate and arranged to receive optical fibers in a vertical direction.
    Type: Application
    Filed: December 9, 2009
    Publication date: April 8, 2010
    Applicant: VERIZON SERVICES ORGANIZATION INC.
    Inventor: David Z. CHEN
  • Patent number: 7676135
    Abstract: A system may include a housing and a patch panel located within the housing. The patch panel may include a connection plate, and a matrix of fiber connectors connected to the connection plate and arranged to receive optical fibers in a vertical direction.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: March 9, 2010
    Assignee: Verizon Patent and Licensing Inc.
    Inventor: David Z. Chen
  • Publication number: 20100046885
    Abstract: An approach is provided for an automated patch panel. A command is received to change a connection state of an optic patch cord. A robotic arm is controlled to change the connection state of the optic patch cord with respect to a particular port of a plurality of ports disposed about a disk-shaped face of a docking panel.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Applicant: Verizon Corporate Services Group Inc.
    Inventor: David Z. Chen
  • Patent number: 7657138
    Abstract: An approach is provided for a free-space optical switch. A command is received to change a connection state of a free-space optical transmission path. A mirror is controlled to change the connection state of the free-space optical transmission path with respect to a particular port of a plurality of ports that interface to respective optical fibers, wherein the ports correspond to holes disposed about a circumferential surface of a port ring.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: February 2, 2010
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: David Z. Chen, Joseph Finn
  • Patent number: 7583490
    Abstract: Apparatus and methodology for discharging static electricity from a vehicle which uses a discharge mechanism that does not contact the roadway (Earth) when the vehicle is in forward motion to reduce, or completely avoid, frictional wear on the discharge mechanism. In one embodiment, the displacement between the discharge mechanism and the roadway is obtained by way of wind force generated by the motion of the vehicle itself. A properly oriented and hinged windscreen attached to the conductive path discharge mechanism can be used for this purpose. Other embodiments including magnetically controlled lifting and holding devices can be used.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 1, 2009
    Assignee: Verizon Services Organization Inc.
    Inventor: David Z. Chen
  • Patent number: 7555189
    Abstract: An optical device may include first and second male connectors and a patch panel that includes through holes for interconnecting the first male connectors and the second male connectors. The optical device may also include a patch panel cleaner to automatically clean the through holes of the patch panel, and a connector cleaner to automatically clean the first male connectors or the second male connectors.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: June 30, 2009
    Assignee: Verizon Services Organization Inc.
    Inventor: David Z. Chen
  • Publication number: 20090154925
    Abstract: A system includes an optical line terminal (OLT) that includes an OLT transmitter. The OLT transmitter includes one or more fixed wavelength optical sources that generate an optical signal at a first wavelength, and an optical waveguide that transmits the optical signal at the first wavelength in an optical network.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 18, 2009
    Applicant: Verizon Services Organization Inc.
    Inventor: David Z. Chen
  • Publication number: 20090067838
    Abstract: A device determines a bandwidth demand for traffic provided between a line terminal (LT) and multiple optical network terminals (ONTs), and dynamically tunes, based on the determined bandwidth demand, one or more tunable filters provided in the LT and the multiple ONTs to one of balance the traffic, protect the traffic, or increase available bandwidth for the traffic.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 12, 2009
    Applicants: Verizon Services Corp., Verizon Services Organization Inc.
    Inventors: David Z. Chen, Joseph M. Finn, Steven Gringeri
  • Publication number: 20080285932
    Abstract: A system may include a housing and a patch panel located within the housing. The patch panel may include a connection plate, and a matrix of fiber connectors connected to the connection plate and arranged to receive optical fibers in a vertical direction.
    Type: Application
    Filed: May 15, 2007
    Publication date: November 20, 2008
    Applicant: Verizon Services Organization Inc.
    Inventor: David Z. Chen
  • Publication number: 20080193095
    Abstract: An optical device may include first and second male connectors and a patch panel that includes through holes for interconnecting the first male connectors and the second male connectors. The optical device may also include a patch panel cleaner to automatically clean the through holes of the patch panel, and a connector cleaner to automatically clean the first male connectors or the second male connectors.
    Type: Application
    Filed: February 14, 2007
    Publication date: August 14, 2008
    Applicant: Verizon Services Organization Inc.
    Inventor: David Z. CHEN
  • Publication number: 20080112105
    Abstract: Apparatus and methodology for discharging static electricity from a vehicle which uses a discharge mechanism that does not contact the roadway (Earth) when the vehicle is in forward motion to reduce, or completely avoid, frictional wear on the discharge mechanism. In one embodiment, the displacement between the discharge mechanism and the roadway is obtained by way of wind force generated by the motion of the vehicle itself. A properly oriented and hinged windscreen attached to the conductive path discharge mechanism can be used for this purpose. Other embodiments including magnetically controlled lifting and holding devices can be used.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 15, 2008
    Inventor: David Z, Chen
  • Patent number: 7315674
    Abstract: A method for implementing a truly hitless tunable filter for use in adding and/or dropping channels in a wavelength division multiplexed (WDM) network is disclosed. An exemplary method for filtering an optical signal may include providing a composite optical signal having several wavelengths including a first wavelength, a second wavelength and other wavelengths. The method may include passing the first wavelength through a filter and reflecting the second wavelength and the other wavelengths with the filter. The method may include making the first wavelength available to a drop port, and making the second wavelength and the other wavelengths available to an output port.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: January 1, 2008
    Assignee: Verizon Business Global LLC
    Inventors: Tiejun J. Xia, David Z. Chen
  • Patent number: 7313298
    Abstract: A method for implementing a truly hitless tunable filter for use in adding and/or dropping channels in a wavelength division multiplexed (WDM) network is disclosed. An exemplary method for filtering an optical signal may include providing a composite optical signal having several wavelengths including a first wavelength, a second wavelength and other wavelengths. The method may include passing the first wavelength through a filter and reflecting the second wavelength and the other wavelengths with the filter. The method may include making the first wavelength available to a drop port, and making the second wavelength and the other wavelengths available to an output port.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: December 25, 2007
    Assignee: Verizon Business Global LLC
    Inventors: Tiejun J. Xia, David Z. Chen
  • Patent number: 7248758
    Abstract: A method for implementing a truly hitless tunable filter for use in adding and/or dropping channels in a wavelength division multiplexed (WDM) network is disclosed. An exemplary method for filtering an optical signal may include providing a composite optical signal having several wavelengths including a first wavelength, a second wavelength and other wavelengths. The method may include passing the first wavelength through a filter and reflecting the second wavelength and the other wavelengths with the filter. The method may include making the first wavelength available to a drop port, and making the second wavelength and the other wavelengths available to an output port.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: July 24, 2007
    Assignee: Verizon Business Global LLC
    Inventors: Tiejun J. Xia, David Z. Chen
  • Patent number: 7155319
    Abstract: A method for controlling liquid delivery in a processing chamber. The method includes generating an analog input (AI) signal proportional to a process variable and calculating an analog output (AO) signal based on a setpoint and a deadband. The setpoint is a target value of the process variable and the deadband is an allowable tolerance around the setpoint that determines when the control logic is activated to control the process variable. The method further includes transmitting the AO signal to a control device and adjusting the process variable proportional to the value of the AO signal.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: December 26, 2006
    Assignee: Applied Materials, Inc.
    Inventors: Roy C. Nangoy, Allen L. D'Ambra, Yevgeniy Rabinovich, David Z. Chen, Tao Li