Patents by Inventor Takeshi Hatakeyama

Takeshi Hatakeyama 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: 20100192839
    Abstract: A group III element nitride single crystal is grown on a template immersed in a raw material liquid retained in a crucible and containing a group III material and one of an alkali metal and an alkali earth metal. The raw material liquid remaining after the growth of the single crystal is cooled and solidified, and by feeding a hydroxyl group-containing solution into the crucible, the solidified raw material is removed from around the template, and thus the group III element nitride single crystal is taken out from inside the solidified raw material. The template is disposed at a position away from the bottom of the crucible.
    Type: Application
    Filed: September 26, 2008
    Publication date: August 5, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Takeshi Hatakeyama, Hisashi Minemoto, Kouichi Hiranaka, Osamu Yamada
  • Publication number: 20100078606
    Abstract: A method for producing a high-quality group-III element nitride crystal at a high crystal growth rate, and a group-III element nitride crystal are provided. The method includes the steps of placing a group-III element, an alkali metal, and a seed crystal of group-III element nitride in a crystal growth vessel, pressurizing and heating the crystal growth vessel in an atmosphere of nitrogen-containing gas, and causing the group-III element and nitrogen to react with each other in a melt of the group-III element, the alkali metal and the nitrogen so that a group-III element nitride crystal is grown using the seed crystal as a nucleus. A hydrocarbon having a boiling point higher than the melting point of the alkali metal is added before the pressurization and heating of the crystal growth vessel.
    Type: Application
    Filed: March 5, 2008
    Publication date: April 1, 2010
    Inventors: Osamu Yamada, Hisashi Minemoto, Kouichi Hiranaka, Takeshi Hatakeyama, Takatomo Sasaki, Yusuke Mori, Fumio Kawamura, Yasuo Kitaoka
  • Publication number: 20090324207
    Abstract: An object is to reduce the effect of defocusing due to the movement of an image plane when a shifting lens group movable in a direction perpendicular to the optical axis for correcting hand jiggling is positionally deviated along the optical axis, thereby maintaining high optical performance at the time of correcting hand jiggling. A zoom lens 1 includes a plurality of lens groups with distances between the lens groups being changed for variable power. A final lens group L5 which is positioned most closely to an image side has a sub lens group GS (G8) having a positive refractive power and a sub lens group GR (G9) disposed adjacent to the sub lens group GS (G8) on the image side and having a positive refractive power. The sub lens group GS is shiftable in a direction perpendicular to the optical axis for correcting image blurs.
    Type: Application
    Filed: February 24, 2006
    Publication date: December 31, 2009
    Applicant: Sony Corporation
    Inventors: Takeshi Hatakeyama, Daisuke Kuroda, Motoyuki Otake, Yoshito Iwasawa
  • Publication number: 20090278744
    Abstract: There is provided a phased array antenna having variable phase shifters constituted by using a variable dielectric-constant dielectric substance whose dielectric constant varies according to an applied electric field, which antenna can dispense with a DC blocking element that causes mismatch, and reduce deformation of the beam shape even when beam tilt occurs, in the case where the variable phase shifters are divided into those for right-side tilt and those for left-side tilt and the phase shift amounts thereof are independently controlled.
    Type: Application
    Filed: October 11, 2006
    Publication date: November 12, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Hideki Kirino, Kouichi Hiranaka, Takeshi Hatakeyama
  • Publication number: 20090232525
    Abstract: The present invention provides a technique to accurately grasp a deterioration state of a development agent in a development device, in a development system which supplies a new development agent consisting of a toner and a carrier and discharges an deteriorated development agent to maintain a performance of a development agent in a development device. An image forming apparatus according to the present invention includes a stirring information obtaining section configured to obtain information of a stirring time of the development agent in the development device, a supply information obtaining section configured to obtain information of an amount of the carrier supplied into the development device, and a deterioration degree determining section configured to determine a deterioration degree of the development agent in the development device on the basis of the information obtained by the stirring information obtaining section and the supply information obtaining section.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 17, 2009
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Takao Izumi, Minoru Yoshida, Hiroshi Murata, Takeshi Hatakeyama
  • Publication number: 20090227746
    Abstract: A production process of a polymerization catalyst component includes contacting compound (a) such as diethyl zinc represented by the defined formula [1], a compound (b) such as pentafluorophenol, represented by the defined formula [2], a compound (c) such as water, represented by the defined formula [3], and particles (d), such as silica, with one another in a hydrocarbon solvent under an agitator power of 0.05 kW/m3 or greater.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 10, 2009
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takeshi HATAKEYAMA, Takuya OGANE
  • Publication number: 20090208195
    Abstract: A zoom lens formed of a plurality of lens groups and performing zooming by changing separations between predetermined lens groups. A lens group closest to an object side is fixed in both optical axis directions during zooming, and has a reflecting member for folding an optical axis approximately 90 degrees. A final lens group positioned closest to an image side and fixed in both optical axis directions during zooming has a lens part group SG having positive refractive power and a lens part group RG arranged adjacent to the image side of the lens part group SG and having negative refractive power. A blur is corrected by shifting the lens part group SG in either direction perpendicular to the optical axis.
    Type: Application
    Filed: January 27, 2009
    Publication date: August 20, 2009
    Applicant: Sony Corporation
    Inventor: Takeshi Hatakeyama
  • Patent number: 7557514
    Abstract: While series resonant circuits 51 to 53 are connected to an output stage of a switching circuit 101 so as to be parallel mutually, primary sides of booster transformer sections 1 to 3 are connected to resonance capacitors 14 to 16 respectively, and further, CCFLs 21 to 23 are connected to secondary sides of the booster transformer sections 1 to 3 respectively.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: July 7, 2009
    Assignee: Sumida Corporation
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Publication number: 20090153072
    Abstract: From the individual small areas of a conductor pattern arranged on the back side of a circuit board, there are individually extended leader patterns, which are midway led by through holes to the surface side of the circuit board. The individual leader patterns led to the surface side are connected with a terminal portion on the low-voltage side through jumper pads. The desired small areas are enabled to function by shorting the jumper pads with solder. The individual small areas are constituted to have a capacity of 1 pF, when caused to function, and they have such a capacity as a pattern capacitor as is proportional to the number of the shorted jumper pads.
    Type: Application
    Filed: April 20, 2007
    Publication date: June 18, 2009
    Applicant: SUMIDA CORPORATION
    Inventor: Takeshi Hatakeyama
  • Patent number: 7515443
    Abstract: An inverter circuit is configured with a reduced number of components for driving a plurality of discharge tubes. Primary coils of a plurality of drive transformers are respectively connected in series to primary coils of corresponding balancer-transformers, and then connected between output terminals of a switching circuit in parallel. The secondary coils of the balancer-transformers are connected in series, and connected between the output terminals of the switching circuit to configure an inverter circuit for driving a plurality of discharge tubes. The inverter circuit includes a voltage detecting circuit for detecting a voltage at any of connecting-midpoint of the series-connected secondary coils of the balancer-transformers, and a voltage comparing circuit for comparing an output of the voltage detecting circuit with a reference voltage. A signal designates an abnormal operation at an output of the voltage comparing circuit when the voltage of the connecting-midpoint exceeds the reference voltage.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: April 7, 2009
    Assignee: Sumida Electric Co., Ltd.
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Patent number: 7466495
    Abstract: An image pickup apparatus includes a zoom lens including at least two movable lens groups; an image pickup element that converts an optical image formed with the zoom lens into an electric signal; and an image processor that electrically corrects a lateral chromatic aberration to be generated at the zoom lens. The zoom lens satisfies Conditional Expressions (1) and (2) as follows, ?5.0<W_ate(X)/T_ate(X)<?0.2??(1) 0.003<|Max_ate(10)/Himg |<0.03??(2) where W_ate(X) is an aberration amount of the lateral chromatic aberration from the C-line to the g-line, at a wide-angle end, corresponding to a (X×10) % image height, T_ate(X) is an aberration amount of the lateral chromatic aberration from the C-line to the g-line, at a telephoto end, corresponding to a (X×10) % image height, Max_ate(X) is one of W_ate(10) and T_ate(10), the one having a larger absolute value, and Himg is a diagonal length of the image pickup element.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: December 16, 2008
    Assignee: Sony Corporation
    Inventors: Daisuke Kuroda, Takeshi Hatakeyama
  • Patent number: 7449842
    Abstract: A discharge tube drive circuit for driving a plurality of discharge tubes is proposed with reduced number of parts and in a down-sized form. A first balance transformer is provided in a first drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the first drive circuit block and a secondary coil of the first balance transformer are connected in series. A second balance transformer is provided in a second drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the second drive circuit block and a secondary coil of the second balance transformer are connected in series. Further, a primary coil of the balance transformer and a primary coil of the second balance transformer are connected in series to configure the discharge tube drive circuit of the present invention.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: November 11, 2008
    Assignee: Sumida Corporation
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Publication number: 20080225405
    Abstract: An image pickup apparatus includes a zoom lens including at least two movable lens groups; an image pickup element that converts an optical image formed with the zoom lens into an electric signal; and an image processor that electrically corrects a lateral chromatic aberration to be generated at the zoom lens. The zoom lens satisfies Conditional Expressions (1) and (2) as follows, ?5.0<W—ate(X)/T—ate(X)<?0.2 ??(1) 0.003<|Max—ate(10)/Himg|<0.03 ??(2) where W_ate(X) is an aberration amount of the lateral chromatic aberration from the C-line to the g-line, at a wide-angle end, corresponding to a (X×10) % image height, T_ate(X) is an aberration amount of the lateral chromatic aberration from the C-line to the g-line, at a telephoto end, corresponding to a (X×10) % image height, Max_ate(X) is one of W_ate(10) and T_ate(10), the one having a larger absolute value, and Himg is a diagonal length of the image pickup element.
    Type: Application
    Filed: April 7, 2008
    Publication date: September 18, 2008
    Applicant: Sony Corporation
    Inventors: Daisuke Kuroda, Takeshi Hatakeyama
  • Publication number: 20080171570
    Abstract: A wireless communications system includes: a first communications processing section for implementing a dedicated communications function that is only for the first wireless communications scheme; a second communications processing section for implementing a dedicated communications function that is only for the second wireless communications scheme; a shared transceiver section shared by the first communications processing section and the second communications processing section; a scheme selection section for selectively inputting a signal from the first communications processing section or a signal from the second communications processing section to the shared transceiver section; and a communications switching control section for indicating, to the scheme selection section, a scheme to be selected.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 17, 2008
    Inventors: Akifumi Nagao, Masataka Irie, Satoshi Makimoto, Yukiyoshi Nagasawa, Takeshi Hatakeyama
  • Publication number: 20080117851
    Abstract: Prior to detection of a start of a session having periodicity in a wireless terminal, the wireless terminal powers on a communication unit that performs wireless communication with a wireless base station, in accordance with a reception timing of receiving a beacon signal once in several times and a generation timing of transmission packets of sessions. After the start of a session having periodicity has been detected in the wireless terminal, the communication unit is only powered on when transmission packets of sessions having periodicity are generated.
    Type: Application
    Filed: October 26, 2007
    Publication date: May 22, 2008
    Inventors: Masataka Irie, Takeshi Hatakeyama, Takeshi Yoshida
  • Publication number: 20080042587
    Abstract: While series resonant circuits 51 to 53 are connected to an output stage of a switching circuit 101 so as to be parallel mutually, primary sides of booster transformer sections 1 to 3 are connected to resonance capacitors 14 to 16 respectively, and further, CCFLs 21 to 23 are connected to secondary sides of the booster transformer sections 1 to 3 respectively.
    Type: Application
    Filed: June 28, 2007
    Publication date: February 21, 2008
    Applicant: Sumida Corporation
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Publication number: 20080031279
    Abstract: Provided is a network chip that controls issuance of interrupts based on the contents of the received packets. The network chip receives a data packet containing a type that indicates a realtime packet or a not-realtime packet, where the realtime packet needs consideration of delay time, and the not-realtime packet does not need consideration of delay time. The network chip obtains a type by analyzing the received packet. When the obtained type indicates a realtime packet, the network chip stores the received packet into a realtime reception packet buffer, and issues an interrupt to the CPU immediately; and when the obtained type indicates a not-realtime packet, it stores the received packet into a not-realtime reception packet buffer, and issues an interrupt to the CPU after a predetermined time period passes, or after the number of packets stored in the not-realtime reception packet buffer reaches a predetermined number.
    Type: Application
    Filed: July 25, 2007
    Publication date: February 7, 2008
    Inventors: Takeshi Hatakeyama, Masataka Irie, Akifumi Nagao, Takeshi Yoshida
  • Publication number: 20080025055
    Abstract: An inverter circuit is configured with a reduced number of components for driving a plurality of discharge tubes. Primary coils of a plurality of drive transformers are respectively connected in series to primary coils of corresponding balancer-transformers, and then connected between output terminals of a switching circuit in parallel. The secondary coils of the balancer-transformers are connected in series, and connected between the output terminals of the switching circuit to configure an inverter circuit for driving a plurality of discharge tubes. The inverter circuit includes a voltage detecting circuit for detecting a voltage at any of connecting-midpoint of the series-connected secondary coils of the balancer-transformers, and a voltage comparing circuit for comparing an output of the voltage detecting circuit with a reference voltage. A signal designates an abnormal operation at an output of the voltage comparing circuit when the voltage of the connecting-midpoint exceeds the reference voltage.
    Type: Application
    Filed: June 12, 2007
    Publication date: January 31, 2008
    Applicant: SUMIDA ELECTRIC CO., LTD.
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Publication number: 20070228987
    Abstract: A discharge tube drive circuit for driving a plurality of discharge tubes is proposed with reduced number of parts and in a down-sized form. A first balance transformer is provided in a first drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the first drive circuit block and a secondary coil of the first balance transformer are connected in series. A second balance transformer is provided in a second drive circuit block, and a plurality of primary coils of a plurality of drive transformers in the second drive circuit block and a secondary coil of the second balance transformer are connected in series. Further, a primary coil of the balance transformer and a primary coil of the second balance transformer are connected in series to configure the discharge tube drive circuit of the present invention.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: SUMIDA CORPORATION
    Inventors: Hiroyuki Miyazaki, Takeshi Hatakeyama
  • Patent number: 7251507
    Abstract: A handsfree video phone system includes a video phone terminal and a car device in which a microphone, a speaker, and a camera are connected with an instrument panel via a cable. The video phone terminal is connected with the instrument panel via a wireless communication medium. When the video phone terminal is brought into the vehicle, the instrument panel informs the video phone terminal of the attribute information on the system structure. According to the attribute information, the video phone terminal switches the paths of multiplexed audio-video data so as to replace a microphone, a speaker, a camera, and a display that have been built in the video phone terminal with the microphone, the speaker, the camera, and a display of the instrument panel when the status changes to the communication status.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: July 31, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuru Kitao, Toshihiko Kurosaki, Takeshi Hatakeyama, Masaki Tomoda