Patents by Inventor Nobuo Takahashi

Nobuo Takahashi 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: 20020115101
    Abstract: Disclosed is a method comprising a pretreatment step of forming a poly-L-lysine layer on a surface of a base plate, a sample preparation step of preparing a sample containing a DNA fragment, a dilution step of diluting the concentration of the obtained sample, and a supply step of supplying a diluted sample solution onto the base plate to produce a DNA chip. The sample preparation step includes an amplification step of PCR-amplifying the DNA fragment to prepare a PCR product, a powder formation step of drying the obtained PCR product to form DNA powder, and a mixing step of dissolving the obtained DNA powder in a buffer solution.
    Type: Application
    Filed: April 24, 2002
    Publication date: August 22, 2002
    Applicant: NGK Insulators, Ltd.
    Inventors: Toshikazu Hirota, Nobuo Takahashi, Yukihisa Takeuchi, Takao Ohnishi
  • Patent number: 6422262
    Abstract: A device for discharging liquid such as raw materials and fuels capable of discharging liquid stably even under such conditions that the environment of a discharge space varies drastically and suddenly by adjusting discharge conditions to optimum ones according to fluctuation of surrounding environment is provided by controlling fluctuation in pressure in the buffer vessel 2 according to fluctuation in pressure in the mixing/reaction vessel 3 with installation of buffer vessel 2 and control means 10 between liquid discharge means 4 for mixing/reaction vessel 3 for discharged liquid, and the storage tank 1 for liquid to be discharged, and also by installing release means capable of releasing pressure in vessel 2 to surrounding atmosphere.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: July 23, 2002
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Nobuo Takahashi
  • Publication number: 20020070639
    Abstract: A ceramic substrate 1 comprises a thin diaphragm portion 3 and a thick portion 2. A lower electrode 4 is formed on the ceramic substrate and is spaced apart from an auxiliary electrode 8, also formed on the ceramic substrate. A bonding layer 7C comprises an insulator and is formed on the ceramic substrate between the lower and auxiliary electrodes. A piezoelectric/electrostrictive layer 5 is formed on at least a portion of each of the lower electrode, the auxiliary electrode and the bonding layer. An upper electrode 6 extends over the piezoelectric/electrostrictive layer and contacts the auxiliary electrode. A bonded portion exist wherein the bonding layer serves to completely bond together the substrate and the piezoelectric/electrostrictive film layer.
    Type: Application
    Filed: September 6, 2001
    Publication date: June 13, 2002
    Applicant: NGK Insulators, Ltd.
    Inventors: Hirofumi Yamaguchi, Nobuo Takahashi
  • Publication number: 20020049645
    Abstract: The present invention determines a selling price appropriate for both a purchaser and a supplier in a system of cooperative buying by a plurality of intending purchasers on a network.
    Type: Application
    Filed: October 16, 2001
    Publication date: April 25, 2002
    Applicant: NEC CORPORATION
    Inventor: Nobuo Takahashi
  • Patent number: 6354200
    Abstract: Disclosed is a screen mask for screen printing including a positive pattern section and a negative pattern section with a mask material (emulsion film) formed on the negative pattern section, for transferring a printing ink to a substrate via openings of a mesh disposed at the positive pattern section, wherein a plating layer is selectively formed on the mesh of the negative pattern section so that the negative pattern section has a mesh opening ratio which is smaller than an opening ratio of the positive pattern section, and a width of a gap, which is formed on the substrate by the negative pattern section, is made to be not more than 40 &mgr;m.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: March 12, 2002
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Koji Kimura, Nobuo Takahashi
  • Publication number: 20010052627
    Abstract: A lower electrode 4 of a substrate 1 is continuously formed from a thin diaphragm portion 3 to a thick region 2, and independently of the lower electrode 4, an auxiliary electrode 8 is formed on the thick region 2 of the substrate 1, whereby a piezoelectric/electrostrictive film 5 is formed across the lower electrode 4 and the auxiliary electrode 8. An incomplete bonding portion of the piezoelectric/electrostrictive film 5 to the substrate 1 is eliminated on the thin diaphragm portion 3, thereby making it possible to reduce significantly a variation in vibration form.
    Type: Application
    Filed: May 7, 2001
    Publication date: December 20, 2001
    Applicant: NGK Insulators, Ltd.
    Inventors: Nobuo Takahashi, Mutsumi Kitagawa, Hirofumi Yamaguchi
  • Publication number: 20010040988
    Abstract: A fingerprint input apparatus is provided that specifies the cause when a failure in fingerprint reading occurs and then notifies a user of the content of the cause and/or the countermeasure against it. The fingerprint input apparatus comprises a fingerprint sensor (1) for reading a fingerprint and then outputting fingerprint image data corresponding to the fingerprint, a fingerprint analyzer (3) for analyzing the quality of a fingerprint image represented by fingerprint image data and creating an evaluation result representing the cause of the quality failure and/or a countermeasure against it when the analysis result indicates a quality failure, and an evaluation result display (2) for displaying the evaluation result.
    Type: Application
    Filed: December 4, 2000
    Publication date: November 15, 2001
    Inventor: Nobuo Takahashi
  • Publication number: 20010039891
    Abstract: Disclosed is a screen mask for screen printing including a positive pattern section and a negative pattern section with a mask material (emulsion film) formed on the negative pattern section, for transferring a printing ink to a substrate via openings of a mesh disposed at the positive pattern section, wherein a plating layer is selectively formed on the mesh of the negative pattern section so that the negative pattern section has a mesh opening ratio which is smaller than an opening ratio of the positive pattern section, and a width of a gap, which is formed on the substrate by the negative pattern section, is made to be not more than 40 &mgr;m.
    Type: Application
    Filed: July 27, 2001
    Publication date: November 15, 2001
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Koji Kimura, Nobuo Takahashi
  • Publication number: 20010022487
    Abstract: A ceramic element comprises a main actuator element 26 having an anti-ferroelectric film 22 and a pair of electrodes 24a, 24b formed on a first principal surface (front surface) of the anti-ferroelectric film 22, a vibrating section 18 for supporting the main actuator element 26, and a fixed section 20 for supporting the vibrating section 18 in a vibrating manner. The anti-ferroelectric film 22 after polarization has a region Zt in which its average dielectric constant is increased in an analog manner in accordance with a voltage V applied to the pair of electrodes 24a, 24b. Specifically, an expression of p/t≦2.5 is satisfied provided that an average film thickness of the anti-ferroelectric film 22 is t, and a pitch between the pair of electrodes 24a, 24b is p.
    Type: Application
    Filed: May 21, 2001
    Publication date: September 20, 2001
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Toshikatsu Kashiwaya, Nobuo Takahashi
  • Publication number: 20010022024
    Abstract: A nozzle for a liquid injection device, wherein a ceramic green sheet (11) used as a bottom part of a liquid injection device having a nozzle (12) disposed between a die (2) and a stripper (3) storing a punch (4) and the punch (4) is moved to form a hole part constituting the nozzle (12), the green sheet (11) is disposed between a die (2′) having a cavity wherein the outer shape of a projected part (12a) of the nozzle (12) is reversed and a stripper (3′) storing a punch (5) so that it is positioned in the direction opposite to that in the previous disposition and the punch (5) is moved to obtain the outer shape of the nozzle (12), and the green sheet (11) is baked, whereby, even in a drying device to which air is constantly applied vertically to the delivery direction of liquid, no injected liquid is deposited substantially at the tip part of the nozzle (12).
    Type: Application
    Filed: May 22, 2001
    Publication date: September 20, 2001
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Nobuo Takahashi
  • Patent number: 6290340
    Abstract: An ink jet print head is disclosed which includes a flow path unit with nozzles, a pressure generating unit disposed on the flow path unit and having ink pressure chambers formed behind the respective nozzles, and piezoelectric/electrostrictive elements each disposed on a wall defining a corresponding ink pressure chamber, for deforming the wall to change a pressure of the ink pressure chamber, whereby the ink in the ink pressure chamber is jetted through the corresponding nozzle. The pressure generating unit includes a spacer plate having windows which closed by a closure plate and a connecting plate disposed on the spacer plate, so as to give the respective ink pressure chambers. The connecting plate has communication holes through which the ink pressure chambers communicate with the nozzles. The spacer plate, closure plate and connecting plate are formed from respective ceramic green sheets, which are laminated on each other and fired into an integral ceramic structure as the pressure generating unit.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: September 18, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Kohei Kitahara, Yukihisa Takeuchi, Hideo Masumori, Nobuo Takahashi, Hideaki Sonehara
  • Publication number: 20010016912
    Abstract: A network printing system with fingerprint authentication function is provided that can improve the security of print results of a printer. A personal computer 2 accepts a print instruction and requires an operator to enter a fingerprint of the operator. A fingerprint input section 1 receives the fingerprint of the operator and issues first fingerprint pattern data S1. The personal computer 2 converts the first fingerprint pattern data S1 into first fingerprint authentication data S2a. The print data S2b is issued to the communication line 3, together with the first fingerprint authentication data S2a. The printer 4 receives the print data S2b and stores it into the print data memory 5. The operator inputs the fingerprint input at the print instruction to the fingerprint input section 6. The printer 4 converts the second fingerprint pattern data S6 into second fingerprint authentication data.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 23, 2001
    Applicant: NEC Corporation
    Inventor: Nobuo Takahashi
  • Patent number: 6265811
    Abstract: A ceramic element comprises a main actuator element 26 having an anti-ferroelectric film 22 and a pair of electrodes 24a, 24b formed on a first principal surface (front surface) of the anti-ferroelectric film 22, a vibrating section 18 for supporting the main actuator element 26, and a fixed section 20 for supporting the vibrating section 18 in a vibrating manner. The anti-ferroelectric film 22 after polarization has a region Zt in which its average dielectric constant is increased in an analog manner in accordance with a voltage V applied to the pair of electrodes 24a, 24b. Specifically, an expression of p/t≦2.5 is satisfied provided that an average film thickness of the anti-ferroelectric film 22 is t, and a pitch between the pair of electrodes 24a, 24b is p.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: July 24, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Toshikatsu Kashiwaya, Nobuo Takahashi
  • Patent number: 6263552
    Abstract: A piezoelectric and/or electrostrictive film-type element comprises a zirconia substrate with a thin-walled diaphragm section provided integrally to cover and close a window to serve as a hollow space, and a film-shaped piezoelectric and/or electrostrictive operating section composed of a lower electrode, a piezoelectric and/or electrostrictive layer, and an upper electrode which are successively provided in a layered configuration on an outer surface of the diaphragm section in accordance with a film-forming method, wherein at least a part of a peripheral edge portion of the piezoelectric and/or electrostrictive layer extends laterally beyond a corresponding peripheral edge portion of the lower electrode to construct an overhang section located opposingly over the diaphragm section, and the overhang section is in a state of incomplete connection with respect to a partial region of the diaphragm section located just under by the aid of particles of an alumina-magnesia compound such as spinel particles allowed
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: July 24, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Koji Kimura, Nobuo Takahashi
  • Patent number: 6256884
    Abstract: A method for producing a nozzle having a projecting tip part, including the steps of disposing a ceramic green sheet between a first die and a stripper containing a first punch, moving the first punch through a first surface of the ceramic green sheet to form a hole therethrough, inverting the ceramic green sheet, disposing the inverted ceramic green sheet between a second die and a stripper containing a second punch, the second die having a cavity in the shape of a negative configuration of the projecting tip part, moving the second punch through the hole formed in the ceramic green sheet to force a portion of the ceramic green sheet into the cavity of the second die and form the projecting tip part, and baking the ceramic green sheet to form the nozzle.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: July 10, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Nobuo Takahashi
  • Patent number: 6217979
    Abstract: A method of producing a piezoelectric/electrostrictive film element is disclosed. The film element includes a zirconia substrate having a window which is closed by a diaphragm portion, and a piezoelectric or electrostrictive unit formed on the substrate and including a piezoelectric or electrostrictive layer between upper and lower electrodes. The method comprises the steps of: (a) preparing the substrate which has been sintered and in which at least the diaphragm portion contains alumina in an amount of 1.1-5.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: April 17, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Koji Kimura, Nobuo Takahashi
  • Patent number: 6200013
    Abstract: There are provided a method for uniform mixing of materials, which comprises arranging two or more droplet-discharging means of piezoelectricity-controlled type, discharging fine droplets from respective droplet-discharging means, and colliding them with each other to achieve uniform mixing, and an apparatus therefor. The directions of discharging from these droplet-discharging means are set so that the fine droplets discharged from respective droplet-discharging means are collided with each other at an angle of about 90° or 0 to 20°. The method and apparatus enables mixing and reaction of very small amounts of materials.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: March 13, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Nobuo Takahashi
  • Patent number: 6171420
    Abstract: When green sheets are laminated and integrally fired for a window spacer plate formed with at least a plurality of windows, a covering plate for covering the windows, and a through hole plate having through holes, communicating with the windows, it is arranged to make a ratio t/w of thickness t of the green sheet for the window spacer place to length w of the through holes formed in the green sheet for the through hole plate, in its minor axis direction one or more, and to form a functional film actuator on the outer surface of the covering plate after firing. A gap (separation) is prevented from being generated in the interface between each ceramics plate in producing a ceramics substrate used for the functional film element.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: January 9, 2001
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuo Takahashi, Tsutomu Nanataki
  • Patent number: 6120137
    Abstract: An ink jet print head is disclosed which includes a flow path unit with nozzles, a pressure generating unit disposed on the flow path unit and having ink pressure chambers formed behind the respective nozzles, and piezoelectric/electrostrictive elements each disposed on a wall defining a corresponding ink pressure chamber, for deforming the wall to change a pressure of the ink pressure chamber, whereby the ink in the ink pressure chamber is jetted through the corresponding nozzle. The pressure generating unit includes a spacer plate having windows which closed by a closure plate and a connecting plate disposed on the spacer plate, so as to give the respective ink pressure chambers. The connecting plate has communication holes through which the ink pressure chambers communicate with the nozzles. The spacer plate, closure plate and connecting plate are formed from respective ceramic green sheets, which are laminated on each other and fired into an integral ceramic structure as the pressure generating unit.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: September 19, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Kohei Kitahara, Yukihisa Takeuchi, Hideo Masumori, Nobuo Takahashi, Hideaki Sonehara
  • Patent number: 6088893
    Abstract: A piezoelectric and/or electrostrictive film-type element comprises a zirconia substrate with a thin-walled diaphragm section provided integrally to cover and close a window to serve as a hollow space, and a film-shaped piezoelectric and/or electrostrictive operating section composed of a lower electrode, a piezoelectric and/or electrostrictive layer, and an upper electrode which are successively provided in a layered configuration on an outer surface of the diaphragm section in accordance with a film-forming method, wherein at least a part of a peripheral edge portion of the piezoelectric and/or electrostrictive layer extends laterally beyond a corresponding peripheral edge portion of the lower electrode to construct an overhang section located opposingly over the diaphragm section, and the overhang section is in a state of incomplete connection with respect to a partial region of the diaphragm section located just under by the aid of particles of an alumina-magnesia compound such as spinel particles allowed
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: July 18, 2000
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Tsutomu Nanataki, Koji Kimura, Nobuo Takahashi