Patents by Inventor David Dai

David Dai 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: 20150222242
    Abstract: A connector for an automotive windshield antenna includes a thin trace portion that is electrically equivalent to a series inductor and a wide trace portion that is electrically equivalent to a shunt capacitor. The capacitor and the inductor form a matching LC network that is adjustable to match antenna impedance and transmission line impedance.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 6, 2015
    Applicant: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Publication number: 20150222006
    Abstract: A vehicle slot antenna wherein an electro-conductive coating is applied to the surface of a glass ply. The peripheral edge of the conductive coating is spaced from the vehicle window edge and connected to a high conductive bus bar to define an annular slot antenna with low resistance loss and improved antenna efficiency. The slot antenna is fed by a thin conductive line located in the middle of the slot and parallel to the bus bar. The thin line along with the conductive coating and window frame form a coplanar waveguide (CPW). The CPW feed provides a convenient feed for the antenna at any point around the perimeter of the window slot and affords antenna tuning and impedance matching. The antenna design can use the characteristic impedance of the CPW line to match the impedance of the slot antenna to the impedance of a coaxial cable or other input impedance.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 6, 2015
    Applicant: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Patent number: 8576130
    Abstract: A vehicle window assembly. The window assembly includes a frame having an inner metal edge and a window pane fixed to the frame. The window pane includes an inner glass ply, an outer glass ply, an interlayer between the inner glass ply and the outer glass ply, and an electro-conductive coating located on a surface of the outer glass ply, wherein the electro-conductive coating has an outer peripheral edge spaced from the inner metal edge of the frame to define an antenna slot. The window assembly also includes an antenna feed structure electrically connected to the outer peripheral edge of the electro-conductive coating and a capacitive coupling strip located on the inner glass ply and overlapping the outer peripheral edge of the electro-conductive coating proximate the antenna feed structure, wherein the coupling strip couples a wide bandwidth radio frequency signal into and out of the antenna slot.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: November 5, 2013
    Assignee: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Patent number: 8466842
    Abstract: A vehicle window assembly. The window assembly includes a glass ply and an electro-conductive coating located on a surface of the glass ply. The electro-conductive coating has an outer peripheral edge that is adapted to be spaced from an inner metal edge of a vehicle frame so as to define an antenna slot. The electro-conductive coating includes at least one deleted portion adjacent the outer peripheral edge, wherein the deleted portion is sized to tune the antenna slot to a desired resonant frequency.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: June 18, 2013
    Assignee: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Publication number: 20120098716
    Abstract: A vehicle window assembly. The window assembly includes a glass ply and an electro-conductive coating located on a surface of the glass ply. The electro-conductive coating has an outer peripheral edge that is adapted to be spaced from an inner metal edge of a vehicle frame so as to define an antenna slot. The electro-conductive coating includes at least one deleted portion adjacent the outer peripheral edge, wherein the deleted portion is sized to tune the antenna slot to a desired resonant frequency.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 26, 2012
    Applicant: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Publication number: 20120098715
    Abstract: A vehicle window assembly. The window assembly includes a frame having an inner metal edge and a window pane fixed to the frame. The window pane includes an inner glass ply, an outer glass ply, an interlayer between the inner glass ply and the outer glass ply, and an electro-conductive coating located on a surface of the outer glass ply, wherein the electro-conductive coating has an outer peripheral edge spaced from the inner metal edge of the frame to define an antenna slot. The window assembly also includes an antenna feed structure electrically connected to the outer peripheral edge of the electro-conductive coating and a capacitive coupling strip located on the inner glass ply and overlapping the outer peripheral edge of the electro-conductive coating proximate the antenna feed structure, wherein the coupling strip couples a wide bandwidth radio frequency signal into and out of the antenna slot.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 26, 2012
    Applicant: Pittsburgh Glass Works, LLC
    Inventor: David Dai
  • Publication number: 20110188401
    Abstract: A method for detecting data frame mode mismatch errors may include receiving a data frame that includes an overhead byte. It may be determined whether a value associated with the overhead byte indicates that a transmitting device operating mode matches a receiving device operating mode. In an additional implementation, it may be determined whether a value associated with the overhead byte indicates that a transmitting device output port matches a receiving device input port. An alarm may be generated when it is determined that the value associated with the overhead byte indicates that either the transmitting device operating mode does not match the receiving device operating mode or the transmitting device output port does not match the receiving device input port.
    Type: Application
    Filed: April 15, 2011
    Publication date: August 4, 2011
    Applicant: JUNIPER NETWORKS, INC.
    Inventors: David Dai SONG, Kenneth S. HUANG
  • Patent number: 7948904
    Abstract: A method for detecting data frame mode mismatch errors may include receiving a data frame that includes an overhead byte. It may be determined whether a value associated with the overhead byte indicates that a transmitting device operating mode matches a receiving device operating mode. In an additional implementation, it may be determined whether a value associated with the overhead byte indicates that a transmitting device output port matches a receiving device input port. An alarm may be generated when it is determined that the value associated with the overhead byte indicates that either the transmitting device operating mode does not match the receiving device operating mode or the transmitting device output port does not match the receiving device input port.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: May 24, 2011
    Assignee: Juniper Networks, Inc.
    Inventors: David Dai Song, Kenneth S. Huang
  • Publication number: 20050080927
    Abstract: A method, apparatus, and computer instructions for managing network addresses. A received network address from a current server is compared for use in identifying the data processing system with a prior network address from a previous server. A release data packet is created if the received network address is a new network address and the previous server is a different server than the current server in which the release data packet includes the prior network address. The release data packet is sent to the previous server in which the release data packet causes the previous server to release the prior network address for reuse.
    Type: Application
    Filed: October 9, 2003
    Publication date: April 14, 2005
    Applicant: International Business Machines Corporation
    Inventors: Ray Anderson, David Dai, Vasu Vallabhaneni, Patrick Vo
  • Publication number: 20050005026
    Abstract: A method, apparatus, and computer instructions for providing host information. A request is received for host information for a remote computer from a requester wherein the request includes one of a host name or an Internet Protocol address. The host information is received from a requester. A media access control address and a subnet mask is identified using the request, and a response is returned to the requester, wherein the response includes the media access control address and the subnet mask.
    Type: Application
    Filed: July 3, 2003
    Publication date: January 6, 2005
    Applicant: International Business Machines Corporation
    Inventors: Deanna Brown, David Dai, Jeffrey Messing, Vasu Vallabhaneni, Patrick Vo