Patents Assigned to AT&T Corp.
  • Metal laminated structure and method for producing the same
    Patent number: 8993121
    Abstract: There is provided a metal laminated structure in which a first metal layer containing tungsten is provided on a first surface of a second metal layer containing copper and a third metal layer containing tungsten is provided on a second surface of the second metal layer opposite to the first surface, and the first metal layer contains crystal grains of tungsten in a form of a columnar crystal extending in a direction perpendicular to the first surface of the second metal layer and the third metal layer contains crystal grains of tungsten in a form of a columnar crystal extending in a direction perpendicular to the second surface of the second metal layer, and a method for producing the metal laminated structure.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: March 31, 2015
    Assignees: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Koji Nitta, Shinji Inazawa, Akihisa Hosoe, Masatoshi Majima, Osamu Suwata, Hiroshi Yokoyama, Shinichi Yamagata, Yugaku Abe
  • Method for producing ammonium tungstate aqueous solution
    Patent number: 8974674
    Abstract: A method for producing an ammonium tungstate aqueous solution includes the steps of: adding sulfuric acid to a solution containing tungstate ions; bringing the solution having the sulfuric acid added therein, into contact with an anion exchange resin; and bringing the anion exchange resin into contact with an aqueous solution containing ammonium ions.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 10, 2015
    Assignees: National University Corporation Nagoya University, A.L.M.T. Corp., Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Hideaki Ito, Takeshi Itakura, Yoshiharu Yamamoto, Kazuo Sasaya, Takuya Okuno, Fumiatsu Sato, Syunsuke Yamanaka, Akihiko Ikegaya
  • MO-SI-B-BASED ALLOY POWDER, METAL-MATERIAL RAW MATERIAL POWDER, AND METHOD OF MANUFACTURING A MO-SI-B-BASED ALLOY POWDER
    Publication number: 20140373681
    Abstract: Provided is a Mo—Si—B-based alloy for a heat-resistant alloy that satisfies, more than conventional, physical properties such as proof stress and hardness adapted to an increase in the melting point of a welding object. A Mo—Si—B-based alloy powder of this invention is such that the full width at half maximum of (600) of Mo5SiB2 in X-ray diffraction peak data is 0.08 degrees or more and 0.7 degrees or less.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 25, 2014
    Applicant: A.L.M.T. Corp.
    Inventors: Shigekazu Yamazaki, Ayuri Tsuji, Masahiro Katoh, Seiji Nakabayashi, Akihiko Ikegaya
  • Fixed deterministic post-backoff for cyclic prioritized multiple access (CPMA) contention-free sessions
    Patent number: 8913597
    Abstract: A cyclic prioritized multiple access method is disclosed which includes Fixed Deterministic Post-Backoff. Fixed deterministic post-backoff reduces conflicts between access points of overlapping cells. Contention-free sessions can be generated, one from each overlapping cell. Each active access point engages in a fixed deterministic post-backoff. A fixed deterministic backoff delay (Bkoff times a fixed number of idle time slots) is used by all access points, with the value of Bkoff being greater than the number of overlapping cells. The Bkoff should be large enough to enable the traffic that needs to be accommodated by the channel. Each access point has a backoff timer that is counted down using the shortest interframe space possible. A contention-free session is initiated when the backoff timer expires, and it is then reset to the value of Bkoff to start a new cycle.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: December 16, 2014
    Assignee: AT&T Intellectual Property II, L.P. via a transfer from AT&T Corp.
    Inventor: Mathilde Benveniste
  • HEAT-RESISTANT ALLOY AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20140356215
    Abstract: Provided is a heat-resistant alloy that satisfies physical properties such as proof stress and hardness adapted to an increase in the melting point of a welding object compared to conventional alloys. A heat-resistant alloy of this invention includes a first phase, as a main component, containing a Mo or W metal phase, a second phase containing a Mo—Si—B-based alloy, and a third phase containing titanium carbonitride, wherein the balance is inevitable compounds and inevitable impurities.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 4, 2014
    Applicant: A.L.M.T.CORP.
    Inventors: Shigekazu Yamazaki, Ayuri Tsuji, Masahiro Kato, Akihiko Ikegaya
  • SINTERED TUNGSTEN ALLOY
    Publication number: 20140308536
    Abstract: There is provided a flat plate-like sintered tungsten alloy that can be molded into a complex shape by press working or forge processing. The flat plate-like sintered tungsten alloy contains 85% by mass or more and 98% by mass or less of W, 1.4% by mass or more and 11% by mass or less of Ni, and 0.6% by mass or more and 6% by mass or less of at least one substance selected from the group consisting of Fe, Cu and Co, wherein an elongation percentage of the flat plate-like sintered tungsten alloy in a planar direction is 20% or more.
    Type: Application
    Filed: November 27, 2012
    Publication date: October 16, 2014
    Applicant: A.L.M.T. Corp
    Inventors: Gouhei Toyoshima, Noboru Uenishi, Norihito Goma, Satoshi Umemoto, Takanori Kadokura, Tomohiro Takida, Kazunaga Sakakibara
  • Cemented carbide and cutting tool using same
    Patent number: 8801816
    Abstract: There are provided a cemented carbide high in thermal diffusivity and excellent in wear resistance, and a cutting tool including a base material formed of this cemented carbide. The cemented carbide is a WC based cemented carbide in which a hard phase mainly constituted of WC grains is bound by a binder phase mainly constituted of Co, and is used for a cutting tool. The binder phase is substantially constituted of Co, or Co and Ni. A total content of Co and Ni is not less than 4.5 mass % and not more than 15 mass %. In this cemented carbide, the WC grains have an average diameter of not less than 0.4 ?m and not more than 4 ?m.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: August 12, 2014
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp., A.L.M.T. Corp.
    Inventors: Takuya Okuno, Kazuhiro Hirose, Hideki Moriguchi, Akihiko Ikegaya, Kazuo Sasaya, Yoshiharu Yamamoto
  • METHOD FOR PRODUCING SODIUM TUNGSTATE, METHOD FOR COLLECTING TUNGSTEN, APPARATUS FOR PRODUCING SODIUM TUNGSTATE, AND METHOD FOR PRODUCING SODIUM TUNGSTATE AQUEOUS SOLUTION
    Publication number: 20140119998
    Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.
    Type: Application
    Filed: December 23, 2013
    Publication date: May 1, 2014
    Applicants: A.L.M.T. Corp., Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiharu Yamamoto, Kazuo Sasaya, Takayuki Fudo, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi, Fumiatsu Sato, Akihiko Ikegaya
  • METHOD FOR PRODUCING SODIUM TUNGSTATE, METHOD FOR COLLECTING TUNGSTEN, APPARATUS FOR PRODUCING SODIUM TUNGSTATE, AND METHOD FOR PRODUCING SODIUM TUNGSTATE AQUEOUS SOLUTION
    Publication number: 20140112847
    Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.
    Type: Application
    Filed: December 23, 2013
    Publication date: April 24, 2014
    Applicants: A.L.M.T. Corp., Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiharu Yamamoto, Kazuo Sasaya, Takayuki Fudo, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi, Fumiatsu Sato, Akihiko Ikegaya
  • Electrodeposited wire tool and manufacturing method thereof
    Patent number: 8677986
    Abstract: An electrodeposited wire tool has a core wire extending in a longitudinal direction, a plating layer provided on an outer peripheral surface of the core wire, superabrasive grains held by the plating layer and coating layers covering the outer peripheral surfaces of the superabrasive grains. The coating layers are constituted of electroless Ni—P platings. The coating layers are heat-treated, and the electroless Ni—P platings are partially or entirely crystallized.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: March 25, 2014
    Assignee: A.L.M.T. Corp.
    Inventors: Katsuo Kazahaya, Yasushi Matsumoto, Toshio Fukunishi, Munehiro Tsujimoto, Hideki Ogawa, Masaaki Yamanaka, Kenji Fukushima
  • Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution
    Patent number: 8632747
    Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: January 21, 2014
    Assignees: A.L.M.T. Corp., Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiharu Yamamoto, Kazuo Sasaya, Takayuki Fudo, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi, Fumiatsu Sato, Akihiko Ikegaya
  • MOLYBDENUM MATERIAL
    Publication number: 20140014235
    Abstract: Provided is an industrially advantageous molybdenum material which is capable of causing secondary recrystallization to occur at a temperature lower than conventional and which, after the secondary recrystallization, can have a structure that comprises giant crystal grains with less grain boundaries and thus is excellent in creep resistance. The molybdenum material has, in at least a part thereof, a portion having a region where the peak intensities of the (110) and (220) diffraction planes are each less than the peak intensity of the (211) diffraction plane, as measured by X-ray diffraction, in a region at a depth of one-fifth of the entire thickness in a plate thickness direction from a surface.
    Type: Application
    Filed: January 11, 2012
    Publication date: January 16, 2014
    Applicant: A.L.M.T. CORP.
    Inventors: Takanori Kadokura, Tomohiro Takida
  • Arrangement for Synchronizing Access Points in WLAN Using Direct-Sequence Spread Spectrum Signaling
    Publication number: 20140016674
    Abstract: An arrangement for providing synchronization between a number of overlapping area access points within a wireless LAN utilizes an Ethernet cable connection to transmit synchronization signals from a centralized hub/switch to each of the access points connected to the cable. The synchronization signal takes the form of a direct sequence spread spectrum (DS-SS) signal. At each access point, a filter is used to recover the synchronization signal, allowing for the group of access points to share a common beacon signal and allowing frequency re-use among the access points.
    Type: Application
    Filed: September 19, 2013
    Publication date: January 16, 2014
    Applicant: AT&T Intellectual Property II, L.P. (formerly known as AT&T Corp.)
    Inventors: Saeed S. Ghassemzadeh, Robert Raymond Miller, John F. Murray
  • Method and apparatus for providing information associated with embedded hyperlinked images
    Patent number: 8625754
    Abstract: A method and apparatus for allowing a network provider to embed hyperlinks within streaming video contents that will enable users to click on an embedded hyperlinked image to obtain more information related to the streaming video contents are disclosed. For example, someone watching a tennis match can click on the hyperlinked image corresponding to one of the players and receive a frame of data about his or her recent performance, or someone watching the news can click on a hyperlinked image of a segment of a world map and receive a frame of data about current events occurring in a particular region.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: January 7, 2014
    Assignee: AT&T Intellectual Property II, L.P. via a transfer from AT&T Corp.
    Inventors: Marian Croak, Hossein Eslambolchi
  • COMPOSITE MEMBER INCLUDING SUBSTRATE MADE OF COMPOSITE MATERIAL
    Publication number: 20130328184
    Abstract: A composite member has a substrate made of a composite material having SiC combined with magnesium or a magnesium alloy, and has a warpage degree of not less than 0.01×10?3 and not more than 10×10?3, the warpage degree being defined as lmax/Dmax, where lmax being a difference between a maximum value and a minimum value of surface displacement of one surface of composite member measured along a longest side thereof, and Dmax being a length of the longest side. Thereby, a composite member capable of efficiently dissipating heat to an installation object, a heat-dissipating member using the composite member, and a semiconductor device having the heat-dissipating member are provided.
    Type: Application
    Filed: February 20, 2012
    Publication date: December 12, 2013
    Applicants: A.L.M.T. CORP., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Isao Iwayama, Taichiro Nishikawa, Toshiya Ikeda, Shigeki Koyama
  • Semiconductor element mounting member, method of producing the same, and semiconductor device
    Patent number: 8575625
    Abstract: A semiconductor element mounting member is arranged to infiltrate a matrix metal into a porous body that is formed by sintering diamond particles being in direct contact with each other and that has an infiltration auxiliary layer selectively formed only on the exposed surface of each diamond particle. A production method includes a step at which a mixture of diamond particles, a powder of a chemical element out of which the infiltration auxiliary layer is made, and an ammonium chloride powder is compressed and molded, is then heated to 900° C. or more, and is formed into the porous body. A semiconductor device has a semiconductor element mounted on an element mounting surface of the semiconductor element mounting member with a connecting layer therebetween.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 5, 2013
    Assignee: A.L.M.T. Corp.
    Inventors: Kouichi Takashima, Yoshifumi Aoi, Eiji Kamijo
  • METHOD AND APPARATUS FOR DATA TRANSMISSION USING MULTIPLE TRANSMIT ANTENNAS
    Publication number: 20130243126
    Abstract: A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MSLE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
    Type: Application
    Filed: February 25, 2013
    Publication date: September 19, 2013
    Applicant: AT&T Corp.
    Inventors: Arthur Robert Calderbank, Ayman F. Naguib, Nambirajan Seshadri, Vahid Tarokh
  • Automatic Mute Detection
    Publication number: 20130235994
    Abstract: A system and methodology for managing a mute function muting a connection to a conference call is disclosed. The system is implemented when the mute function is activated on a line connected to a conference call through a telecommunications network. The method includes receiving a sound, determining whether the sound meets predetermined criteria and if the sound meets predetermined criteria then performing a mute status operation.
    Type: Application
    Filed: April 23, 2013
    Publication date: September 12, 2013
    Applicant: AT&T Intellectual Property II, L.P., via transfer from AT&T Corp.
    Inventor: AT&T Intellectual Property II, L.P., via transfer from AT&T Corp.
  • INTEGRATION OF HOME ENTERTAINMENT DEVICES WITH A SOFTWARE CLIENT FOR TELEPHONY
    Publication number: 20130222527
    Abstract: A communication system including a communication network, an entertainment device connected to the communication network, and an application server connected to the communication network. The entertainment device has a software client adapted to provide real time two-way communication between the entertainment device and a telephony device connected to the communication network. The application server is adapted to communicate with the software client and facilitate the real time two-way communication between the entertainment device and the telephony device.
    Type: Application
    Filed: April 8, 2013
    Publication date: August 29, 2013
    Applicant: AT&T CORP.
    Inventor: AT&T CORP.
  • METHOD AND APPARATUS FOR STAGGERING INTERNET PROTOCOL TELECONFERENCING CALLS
    Publication number: 20130223291
    Abstract: A method and apparatus for enabling providers of PSTN toll free services to stagger simultaneous transmission of call setup signaling messages into an IP based teleconference bridge, supported by a VoIP network, by suspending a subset of calls and placing them on hold while placing other calls to be connected to the conference bridge are disclosed. The PSTN network can stagger calls by limiting the number of call setup signaling messages to be sent to the VoIP network within a predefined period of time interval and spread all the calls over multiple of such predefined periods. Prerecorded announcements or music can be played while the calls that have been placed on hold are in queue.
    Type: Application
    Filed: April 1, 2013
    Publication date: August 29, 2013
    Applicant: AT&T Corp.
    Inventor: AT&T Corp.