Patents by Inventor Takeshi Kuwano
Takeshi Kuwano 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).
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Patent number: 11009409Abstract: To improve the efficiency of pressure detection, a driver applies a positive-phase signal to a capacitance element from an opposite side to a coupling point in a control device. Another driver applies a reverse-phase signal to another capacitance element from an opposite side to the coupling point. A control unit detects pressures applied to the capacitance elements based on a potential fluctuation at the coupling point.Type: GrantFiled: November 6, 2018Date of Patent: May 18, 2021Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Masato Hirai, Takeshi Yoshizawa, Takeshi Kuwano
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Publication number: 20190195703Abstract: To improve the efficiency of pressure detection, a driver applies a positive-phase signal to a capacitance element from an opposite side to a coupling point in a control device. Another driver applies a reverse-phase signal to another capacitance element from an opposite side to the coupling point. A control unit detects pressures applied to the capacitance elements based on a potential fluctuation at the coupling point.Type: ApplicationFiled: November 6, 2018Publication date: June 27, 2019Inventors: Masato HIRAI, Takeshi YOSHIZAWA, Takeshi KUWANO
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Patent number: 10216482Abstract: The speed of pen position detection is improved without increasing the circuit area and the current consumption. A sampling circuit samples a signal and outputs sampling data. A arithmetic circuit calculates a real part and an imaginary part of the sampling data. The arithmetic circuit classifies the real part of the sampling data into one of a plurality of groups and classifies the imaginary part of the sampling data into one of the groups according to an order of output of the sampling data from the sampling circuit. Then, the arithmetic circuit adds together real parts of sampling data belonging to a group and adds together imaginary parts of sampling data belonging to a group for each of the groups, and calculates amplitude and phase of the signal by using an addition result of the real parts and an addition result of the imaginary parts of each of the groups.Type: GrantFiled: June 13, 2018Date of Patent: February 26, 2019Assignee: Renesas Electronics CorporationInventors: Masato Hirai, Yuki Higuchi, Takeshi Kuwano, Kosuke Fuwa
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Publication number: 20180300106Abstract: The speed of pen position detection is improved without increasing the circuit area and the current consumption. A sampling circuit samples a signal and outputs sampling data. A arithmetic circuit calculates a real part and an imaginary part of the sampling data. The arithmetic circuit classifies the real part of the sampling data into one of a plurality of groups and classifies the imaginary part of the sampling data into one of the groups according to an order of output of the sampling data from the sampling circuit. Then, the arithmetic circuit adds together real parts of sampling data belonging to a group and adds together imaginary parts of sampling data belonging to a group for each of the groups, and calculates amplitude and phase of the signal by using an addition result of the real parts and an addition result of the imaginary parts of each of the groups.Type: ApplicationFiled: June 13, 2018Publication date: October 18, 2018Inventors: Masato HIRAI, Yuki HIGUCHI, Takeshi KUWANO, Kosuke FUWA
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Patent number: 10019233Abstract: The speed of pen position detection is improved without increasing the circuit area and the current consumption. A sampling circuit samples a signal and outputs sampling data. A arithmetic circuit calculates a real part and an imaginary part of the sampling data. The arithmetic circuit classifies the real part of the sampling data into one of a plurality of groups and classifies the imaginary part of the sampling data into one of the groups according to an order of output of the sampling data from the sampling circuit. Then, the arithmetic circuit adds together real parts of sampling data belonging to a group and adds together imaginary parts of sampling data belonging to a group for each of the groups, and calculates amplitude and phase of the signal by using an addition result of the real parts and an addition result of the imaginary parts of each of the groups.Type: GrantFiled: January 10, 2017Date of Patent: July 10, 2018Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Masato Hirai, Yuki Higuchi, Takeshi Kuwano, Kosuke Fuwa
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Patent number: 9970242Abstract: Disclosed herein are embodiments of a drill pipe tool joint and a drill pipe which are optimized for repeated make-up/break-out operations without the use of screw grease. Embodiments of the disclosure are environment friendly as well as having improved operating efficiency. In particular, the box and pin can be formed from different materials having different hardness.Type: GrantFiled: January 11, 2013Date of Patent: May 15, 2018Assignee: Tenaris Connections B.V.Inventors: Tomoyuki Narikawa, Tatsuo Ono, Koji Sakura, Toshihiko Fukui, Motohisa Yoshida, Takeshi Kuwano, Nobuo Kobayashi, Nobuhide Sato
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Publication number: 20170199725Abstract: The speed of pen position detection is improved without increasing the circuit area and the current consumption. A sampling circuit samples a signal and outputs sampling data. A arithmetic circuit calculates a real part and an imaginary part of the sampling data. The arithmetic circuit classifies the real part of the sampling data into one of a plurality of groups and classifies the imaginary part of the sampling data into one of the groups according to an order of output of the sampling data from the sampling circuit. Then, the arithmetic circuit adds together real parts of sampling data belonging to a group and adds together imaginary parts of sampling data belonging to a group for each of the groups, and calculates amplitude and phase of the signal by using an addition result of the real parts and an addition result of the imaginary parts of each of the groups.Type: ApplicationFiled: January 10, 2017Publication date: July 13, 2017Inventors: Masato HIRAI, Yuki HIGUCHI, Takeshi KUWANO, Kosuke FUWA
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Publication number: 20150368986Abstract: A drill pipe tool joint comprising: a pin including a male threaded portion at an outer surface; and a box including a female threaded portion at an inner surface, the female threaded portion to be screwed and fastened to the male threaded portion in a contacting zone consisting of a male threaded contacting surface and a female threaded contacting surface, wherein at least a portion of the male threaded contacting surface or a portion of the female threaded contacting surface is a surface layer consisting of a hard metal and respectively at least a portion of the female threaded contacting surface or a portion of the male threaded contacting surface is a surface layer consisting of a soft material and where said both surface portions are contacting surfaces after screwing.Type: ApplicationFiled: January 11, 2013Publication date: December 24, 2015Inventors: Tomoyuki Narikawa, Tatsuo Ono, Koji Sakura, Toshihiko Fukui, Motohisa Yoshida, Takeshi Kuwano, Nobuo Kobayashi, Nobuhide Sato
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Patent number: 7573324Abstract: A reference voltage generator according to an embodiment of the present invention includes: a voltage setting circuit generating a first voltage having a predetermined voltage difference from an output voltage; a voltage buffer receiving the first voltage and outputting a first power supply substantially equal to the first voltage; a voltage clamp circuit operating based on a second power supply and a third power supply; and a band-gap circuit generating the output voltage, the band-gap circuit operating based on the second power supply and the first power supply output from the voltage clamp circuit.Type: GrantFiled: November 7, 2006Date of Patent: August 11, 2009Assignee: NEC Electronics CorporationInventor: Takeshi Kuwano
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Publication number: 20070115033Abstract: An output circuit includes: a current source transistor connected between a high-potential-side power supply and an output terminal; a current sinking transistor connected between a low-potential-side power supply and the output terminal; a third transistor constituting a current mirror circuit together with the current source transistor; a fourth transistor connected with the third transistor to control a driving current of the current source transistor; and a fifth transistor supplying a current corresponding to a base potential of the current sinking transistor to the fourth transistor.Type: ApplicationFiled: November 6, 2006Publication date: May 24, 2007Inventor: Takeshi KUWANO
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Publication number: 20070103226Abstract: A reference voltage generator according to an embodiment of the present invention includes: a voltage setting circuit generating a first voltage having a predetermined voltage difference from an output voltage; a voltage buffer receiving the first voltage and outputting a first power supply substantially equal to the first voltage; a voltage clamp circuit operating based on a second power supply and a third power supply; and a band-gap circuit generating the output voltage, the band-gap circuit operating based on the second power supply and the first power supply output from the voltage clamp circuit.Type: ApplicationFiled: November 7, 2006Publication date: May 10, 2007Applicant: NEC ELECTRONICS CORPORATIONInventor: Takeshi Kuwano
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Patent number: 5031434Abstract: A plug for manufacturing a seamless steel pipe is disclosed. The plug includes the surface layer made of molybdenum or molybdenum base alloy coming in contact with a workpiece to be drilled and the core covered with the surface layer. The surface of the core being in contact with the surface layer is formed uneven. According to the invention, the surface layer and the core are strongly joined together, and the life of the plug is elongated.Type: GrantFiled: February 28, 1990Date of Patent: July 16, 1991Assignee: NKK CorporationInventors: Akira Takase, Takashi Tamura, Tsuneo Oikawa, Yutaka Mihara, Tomoyuki Hirakawa, Takeshi Kuwano
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Patent number: 4005483Abstract: An automatic record control apparatus is disclosed in which multichannel tracks of a rotary magnetic recording medium are endlessly traced one track-by-one track in response to pulses associated with vertical synchronizing pulses of a video signal. With the closing of a recording switch, the video signal is recorded in the tracks being traced, and the number of the recording tracks to be recorded are limited to a predetermined number from the instant of detection of a signal associated with a motion of an object to be recorded by counting the number of the signal, the recording operation being automatically stopped after coverage of predetermined number of tracks.Type: GrantFiled: November 15, 1974Date of Patent: January 25, 1977Assignee: Hitachi, Ltd.Inventor: Takeshi Kuwano