Patents by Inventor Takashi Okubo

Takashi Okubo 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: 20120104970
    Abstract: A lighting power supply device receives a voltage converted from an alternating current to a direct current by a rectifying circuit rectifying the alternating current whose phase is controlled by a phase control type dimmer, and generates and outputs a direct current voltage/current to be supplied to a load. The lighting power supply device includes: a control circuit, and the control circuit gradually decreases a current drawn from the rectifying circuit from a predetermined current value set in advance, determines a current value immediately before detecting a malfunction of the phase control type dimmer as a drawn current value, and performs current control so as to maintain the determined current value.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 3, 2012
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Takashi OKUBO, Taro Isogai
  • Patent number: 7527876
    Abstract: A surface-treated steel sheet is disclosed, including a zinc based plated steel sheet having thereon a surface-treated film containing titanium, nickel, aluminum and fluorine and having a film thickness of from 0.05 to 1.0 ?m, the surface-treated film having a titanium deposition amount of from 0.01 to 0.5 g/m2 and containing from 0.01 to 5 parts by mass of nickel, from 0.1 to 25 parts by mass of aluminum and from 1 to 500 parts by mass of fluorine relative to 100 parts by mass of titanium. This surface-treated steel sheet does not contain hexavalent chromium in the film thereof at all and has excellent heat discoloration resistance, corrosion resistance and resistance to blackening.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: May 5, 2009
    Assignees: JFE Steel Corporation, Kansai Paint Co., Ltd.
    Inventors: Nobue Fujibayashi, Akira Matsuzaki, Satoru Ando, Syuji Nomura, Takahiro Kubota, Yoshikazu Morohoshi, Takashi Nakano, Takashi Okubo, Jun Akui
  • Publication number: 20080063896
    Abstract: A surface-treated steel sheet is disclosed, including a zinc based plated steel sheet having thereon a surface-treated film containing titanium, nickel, aluminum and fluorine and having a film thickness of from 0.05 to 1.0 ?m, the surface-treated film having a titanium deposition amount of from 0.01 to 0.5 g/m2 and containing from 0.01 to 5 parts by mass of nickel, from 0.1 to 25 parts by mass of aluminum and from 1 to 500 parts by mass of fluorine relative to 100 parts by mass of titanium. This surface-treated steel sheet does not contain hexavalent chromium in the film thereof at all and has excellent heat discoloration resistance, corrosion resistance and resistance to blackening.
    Type: Application
    Filed: September 6, 2007
    Publication date: March 13, 2008
    Applicants: JFE STEEL CORPORATION, KANSAI PAINT CO., LTD.
    Inventors: Nobue Fujibayashi, Akira Matsuzaki, Satoru Ando, Syuji Nomura, Takahiro Kubota, Yoshikazu Morohoshi, Takashi Nakano, Takashi Okubo, Jun Akui
  • Publication number: 20050213689
    Abstract: A communication semiconductor integrated circuit has a demodulator circuit built in a single semiconductor chip.
    Type: Application
    Filed: January 19, 2005
    Publication date: September 29, 2005
    Inventors: Keisuke Matsuda, Takashi Okubo, Toyokazu Hori, Kazuyuki Takada
  • Publication number: 20040087713
    Abstract: A water based coating composition prepared by dispersing a heat-curable coating composition into water in the presence of a suspension stabilizer comprising a block copolymer to obtain a water dispersion, followed by optionally removing an organic solvent from the water dispersion to obtain a water based coating composition having a mean particle size of 0.
    Type: Application
    Filed: April 3, 2003
    Publication date: May 6, 2004
    Inventors: Takeshi Fujii, Takashi Okubo, Hiroshi Igarashi, Takato Adachi, Tetsuo Ogawa
  • Publication number: 20040049000
    Abstract: A water based coating composition prepared by dispersing by use of a suspension stabilizer into water a film-forming component of 30 to 90 percent by weight of (a) a blocked isocyanate compound having at least two blocked isocyanate groups in one molecule and a number average molecular weight of 150 to 5000, and 10 to 70 percent by weight of (b) a methylol group or methylol ether group-containing aminoplast crosslinking agent. The film-forming component can be dispersed into water in the form of a mean particle size by a 50 percent cumulative particle size of 0.1 to 10 &mgr;m. The coating film-forming component in the water based coating composition is very stable in water and is particularly suitable for the water-based coating composition. The coating film-forming component scarcely shows solubility and dispersibility into water by itself, but dispersion thereof with the suspension stabilizer shows excellent dispersion stability.
    Type: Application
    Filed: April 3, 2003
    Publication date: March 11, 2004
    Inventors: Takashi Okubo, Takato Adachi, Hisashi Isaka, Takeshi Fujii, Hiroshi Igarashi
  • Patent number: 6526133
    Abstract: A telephone stores a plurality of pairs of data in a memory 7, each pair consisting of a caller telephone number received from a telephone number forwarding service, and the time at which the telephone number was received. In response to a first operation, a control unit 1 controls a sequential display of a first display image and a second display image by the display unit using a content of the memory 7. The first display image includes caller telephone numbers and the second display image includes other display content. In response to a second operation, the control unit 1 continuously controls the display of a first display image on the display unit using the content of memory 7 to update caller telephone numbers displayed in the first display image.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: February 25, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahiro Izaki, Takashi Okubo
  • Patent number: 6300481
    Abstract: The present invention provides an optically functional material comprising a rare-earth complex represented by the formula (I) wherein M is a rare-earth atom, n1 is 2 or 3, n2 is 2, 3 or 4, R is a C1-C20 group containing no H, X is a Group IVA atom, Group VA atom other than nitrogen or Group VIA atom other than oxygen, n3 is 0 or 1, and Y is C-Z′ (wherein Z′ is D, a halogen or C1-C20 group containing no H), N, P, As, Sb or Bi, or by the formula (II) wherein N, R, X, n1, n2 and n3 are as defined above.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: October 9, 2001
    Assignee: New Japan Chemical Co., Ltd.
    Inventors: Shozo Yanagida, Yasuchika Hasegawa, Yuji Wada, Tatsuhiko Yamanaka, Takashi Okubo
  • Patent number: 5024309
    Abstract: A rotational speed differential responsive type control coupling is provided with a device for manually or automatically preventing relative rotation of a drive housing and rotor in order to prevent working oil from being heated up to an excessively high temperature.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: June 18, 1991
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toji Takemura, Takashi Okubo
  • Patent number: 4958711
    Abstract: A rotational speed differential type torque transmitting assembly includes a rotor rotatably disposed in a drive housing. During rotational speed differential between the rotor and drive housing, hydraulic fluid is discharged out of variable volume chamber on discharge stroke of the associated piston. Orifices are provided to restrict flow of hydraulic fluid discharged, inducing a pressure rise and adiabatic compression of the hydraulic fluid, causing heat build-up in the rotor. In order to prevent excessive rise in temperature of the assembly, a temperature responsive type spool valve is provided to close the orifice means in response to temperature rise of the hydraulic fluid in the rotor.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: September 25, 1990
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takashi Okubo, Toji Takemura
  • Patent number: 4957473
    Abstract: A limited slip differential is disclosed which includes a first rotary element, a second rotary element, and hydraulic means including a plurality of reciprocal pistons in slidable engagement with internal cam surface means of the first rotary element. The hydraulic means include an accumulator and fluid passage means in fluid communication with the accumulator and each of pressure chambers defined by the pistons. A pressure relief valve is provided in the accumulator chamber to prevent excessive increase in hydraulic fluid pressure in the hydraulic means.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: September 18, 1990
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tooji Takemura, Takashi Okubo
  • Patent number: 4921085
    Abstract: A torque transmitting assembly in the form of a rotational speed differential responsive type joint is disclosed. It comprises a drive housing as a first rotary member and a rotor as a second rotary member. The second rotary member is disposed in the first rotary member. A hydraulic fluid arrangement transmits at least a portion of the input torque from one of the first and second rotary members to the other in response to a rotational speed of the second rotary member and also to a rotational speed differential occurring between the first and second rotary members.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: May 1, 1990
    Assignee: Nissan Motor Company, Limited
    Inventors: Toji Takemura, Takashi Okubo
  • Patent number: 4642307
    Abstract: 1-phenoxy-3-(4-phenylpiperazino)-2-propanol derivatives of the formula (I): ##STR1## and pharmaceutically acceptable salts thereof wherein R.sup.1 is hydrogen, halo or lower alkyl; R.sup.2 is pyrrolidino, piperidino, morpholino or perhydroazepino unsubstituted or substituted by carbonyl at the alpha-position; R.sup.3 is hydrogen, lower alkyl or lower alkoxycarbonyl; and R.sup.4 is hydrogen, lower alkyl unsubstituted or alpha-substituted by lower alkoxy, lower alkoxy, halo or lower alkanoyl are useful for their alpha and beta-adrenergic blocking action and their hypotensive activity in humans and animals.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: February 10, 1987
    Assignee: Nippon Shinyaku Co., Ltd.
    Inventors: Yoshiaki Aoyagi, Takashi Okubo, Toshio Tomita, Hiroshi Nishida, Hiroshi Enomoto