Patents by Inventor Seiji Murakami
Seiji Murakami 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: 6200767Abstract: The present invention provides a process for eliminating effectively ATP in a sample, using adenosine phosphate deaminase alone or in combination with at least one enzyme from the group consisting of apyrase, alkaline phosphatase, acid phosphatase, hexokinase and adenosine triphosphatase, a process for determining biological cells contained in foods and beverages in convenient and precise manner in combination with bioluminescence method, and a reagent for the determination thereof.Type: GrantFiled: January 5, 1999Date of Patent: March 13, 2001Assignee: Kikkoman CorporationInventors: Tatsuya Sakakibara, Seiji Murakami, Noriaki Hattori, Keiko Yajitate, Teruo Watarai, Motoo Nakajima, Kazuhiro Imai
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Patent number: 6150794Abstract: The charging system of the invention comprises a primary charging device 4 disposed at a predetermined location, and a secondary charging device 6 mounted on the body 1 of a bicycle. The secondary charging device 6 comprises a secondary coil unit 50, rectifying circuit and charging control circuit which are housed in a casing 610. The secondary coil unit 50 is connected to a battery 20 mounted on the bicycle body 1 by a cord, and comprises a secondary coil 502 provided around an iron core 501. On the other hand, the primary charging device 4 comprises a primary coil unit 30 and charging circuit which are housed in a casing 410. The primary coil unit 30 comprises a primary coil 302 provided around an iron core 301. When the secondary coil unit 50 is positioned close to the primary coil unit 30, the battery 20 can be charged by the charging system.Type: GrantFiled: September 29, 1998Date of Patent: November 21, 2000Assignee: Sanyo Electric Co., Ltd.Inventors: Makoto Yamada, Hiroshi Kutsuyama, Hideaki Aoki, Seigou Torita, Kazushige Kakutani, Seiji Murakami, Keiji Kishimoto, Masahiro Maekawa
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Mutant-type bioluminescent protein, and process for producing the mutant-type bioluminescent protein
Patent number: 6074859Abstract: According to the present invention, there can be provided a bioluminescent protein, luciferase excellent in thermostability etc. and with high catalytic efficiency.Type: GrantFiled: July 8, 1998Date of Patent: June 13, 2000Assignee: Kikkoman CorporationInventors: Kozo Hirokawa, Naoki Kajiyama, Seiji Murakami -
Patent number: 6011366Abstract: The invention provides an electric bicycle comprising an electric motor mounted on the body of the bicycle between the saddle and the outer periphery of the rear wheel, and a belt transmission mechanism for transmitting the rotation of the motor to the rear wheel on speed reduction. The belt transmission mechanism comprises a drive pulley provided between the saddle and the outer periphery of the rear wheel for receiving the power of the motor, a driven pulley having the same diameter as the rim of the rear wheel and rotatable with the rear wheel alongside the rim, and a belt reeved around the drive pulley and the driven pulley. These components realize a simple construction wherein the rotation of the motor can be transmitted to the rear wheel as reduced to the desired speed in a smaller number of stages.Type: GrantFiled: July 31, 1997Date of Patent: January 4, 2000Assignee: Sanyo Electric Co., Ltd.Inventors: Seiji Murakami, Hideaki Aoki
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Patent number: 5891702Abstract: The present invention provides a process for eliminating effectively ATP in a sample, using adenosine phosphate deaminase alone or in combination with at least one enzyme selected from the group consisting of apyrase, alkaline phosphatase, acid phosphatase, hexokinase and adenosine triphosphatase, a process for determining biological cells contained in foods and beverages in convenient and precise manner in combination with bioluminescence method, and a reagent for the determination thereof.Type: GrantFiled: December 26, 1996Date of Patent: April 6, 1999Assignee: Kikkoman CorporationInventors: Tatsuya Sakakibara, Seiji Murakami, Noriaki Hattori, Keiko Yajitate, Teruo Watarai, Motoo Nakajima, Kazuhiro Imai
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Patent number: 5891659Abstract: There is provided a bioluminescence reagent comprising at least pyruvate orthophosphate dikinase, phosphoenolpyruvic acid, pyrophosphoric acid, magnesium ion or another metallic ions, luciferin and luciferase, which reagent is such that the amount of luminescence is maintained in a high level and moreover stably without decaying for a long time in a bioluminescence reaction, and there is provided a method for quantitatively determining an adenosine phosphate ester or a substance taking part in the ATP conversion reaction in high sensitivity and high accuracy using an inexpensive and simple measuring apparatus.Type: GrantFiled: February 26, 1997Date of Patent: April 6, 1999Assignee: Kikkoman CorporationInventors: Seiji Murakami, Tatsuya Sakakibara, Naoki Eisaki, Motoo Nakajima, Kazuhiro Imai
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Patent number: 5597223Abstract: A display apparatus includes a light source, a modulating device for modulating light emitted from the light source, a modulating device driving unit for driving the modulating device, a first aperture stop unit arranged between the light source and the modulating device to limit a bundle of rays to be incident on the modulating device from the light source, the first aperture stop unit having an aperture with a variable size, a display screen onto which exit light from the modulating device is projected, a projection optical system for projecting the exit light from the modulating device onto the display screen, a second aperture stop unit arranged between the modulating device and the projection optical system to limit a bundle of rays to be incident on the projection optical system from the modulating device, the second aperture stop unit having an aperture with a variable size, a photosensor for detecting the display luminance on the display screen, and an aperture control unit for controlling the size ofType: GrantFiled: December 27, 1994Date of Patent: January 28, 1997Assignee: Kabushiki Kaisha ToshibaInventors: Yoshihiro Watanabe, Hiroki Nakamura, Nozomu Harada, Seiji Murakami, Tsutomu Sakamoto, Kazuki Taira, Yutaka Saitoh
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Patent number: 5519518Abstract: A display apparatus includes a light source, a modulating device for modulating light emitted from the light source, a modulating device driving unit for driving the modulating device, a first aperture stop unit arranged between the light source and the modulating device to limit a bundle of rays to be incident on the modulating device from the light source, the first aperture stop unit having an aperture with a variable size, a display screen onto which exit light from the modulating device is projected, a projection optical system for projecting the exit light from the modulating device onto the display screen, a second aperture stop unit arranged between the modulating device and the projection optical system to limit a bundle of rays to be incident on the projection optical system from the modulating device, the second aperture stop unit having an aperture with a variable size, a photosensor for detecting the display luminance on the display screen, and an aperture control unit for controlling the size ofType: GrantFiled: June 7, 1995Date of Patent: May 21, 1996Assignee: Kabushiki Kaisha ToshibaInventors: Yoshihiro Watanabe, Hiroki Nakamura, Nozomu Harada, Seiji Murakami, Tsutomu Sakamoto, Kazuki Taira, Yutaka Saitoh
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Patent number: 5301017Abstract: A projection-type display apparatus having a lamp which emits a high intensity white light, two dichroic mirrors which filter out the three primary color beams from the white light and three liquid crystal panels which, respectively, modulate the color beams according to the three color image signals. Characteristics of the lamp and the dichroic mirrors are set so that the reproduction chromaticity range includes transmission chromaticity ranges of both the NTSC and HDTV systems. The image signals are supplied to two types of linear matrix circuit which are, respectively, suited for the NTSC and HDTV systems in order to correct color reproduction errors. The output of the linear matrix circuits are selected according to the system of the received television signal. In addition, a display white color temperature is set in the corrected image signals according to the system. Thus, the image signals are supplied to a display device such that the colors of the image can be accurately reproduced.Type: GrantFiled: August 11, 1993Date of Patent: April 5, 1994Assignee: Kabushiki Kaisha ToshibaInventor: Seiji Murakami
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Patent number: 5290185Abstract: A toy robot which can make realistic movement of boxing. The robot has plural driver devices each having an electric motor. The robot has arms driven by the driver devices. The driver devices are remotely controlled to operate the arms. The robot has a waist and a pillar protruding upward from this waist. One of the driver devices rotates the trunk through a given angle against the action of a return spring. One arm is held to a pivot mounted at one shoulder portion such that the arm can rotate laterally. An operating member is mounted to the pivot. As the trunk turns, the operating member pushes the underside of the bearing portion of the arm. The other arm can be bent at its elbow and consists of an upper arm and a forearm which are joined together by a link. When the upper arm is directed forward, the upper arm and the forearm are made substantially straight. Another driver device rotates the upper arm forwardly from below.Type: GrantFiled: December 30, 1992Date of Patent: March 1, 1994Assignee: Kabushiki Kaisha BandaiInventor: Seiji Murakami
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Patent number: 5254470Abstract: Alkaline protease which has leucine or isoleucine in the place of valine at the amino acid number 40 of wild type alkaline protease, a gene encoding the amino acid sequence of alkaline protease which has the substitution as described above, a recombinant DNA comprising said gene, a method of producing the above described alkaline protease, and a DNA fragment used for the expression of a gene.Type: GrantFiled: March 20, 1991Date of Patent: October 19, 1993Assignee: Japanese Research and Development Association for Improvement of Enzyme Function in Food IndustryInventors: Seiji Murakami, Hiroki Tatsumi, Yoshihiro Ogawa, Eiichi Nakano, Hiroshi Motai, Shigetoshi Sugio, Atsushi Masaki, Yutaka Ishida, Kohji Murakami, Haruhide Kawabe, Hirofumi Arimura
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Patent number: 4307320Abstract: Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.Type: GrantFiled: June 19, 1979Date of Patent: December 22, 1981Assignee: Kasei Optonix, Ltd.Inventors: Noboru Kotera, Thihiro Yoshida, Toshiaki Hatsumi, Kazuhito Iwasaki, Isao Iwamoto, Katuzo Kanda, Seiji Murakami, Shusaku Eguchi
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Patent number: 4287257Abstract: A phosphor for color television surface-treated with zinc hydroxide so that zinc hydroxide attaches thereto in an amount below 0.7 part by weight per 100 parts by weight of the phosphor.Phosphor slurries for production of phosphor screens prepared from the phosphor have improved light-exposure sensitivity at the formation of and produced from these slurries phosphor screens showing less color mixing.Type: GrantFiled: September 17, 1979Date of Patent: September 1, 1981Assignee: Kasei Optonix, Ltd.Inventors: Susumu Ohmatoi, Hitoshi Tanaka, Seiji Murakami
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Patent number: 4152483Abstract: On the surface of a phosphor, pigment particles are uniformly adhered by a layer of a gelatin-gum arabic mixture. A process for manufacturing such a pigment coated phosphor includes the steps of preparing an aqueous solution of gelatin and an aqueous solution of gum arabic, allowing the phosphor to disperse homogeneously into one of these aqueous solutions, allowing the pigment particles to disperse homogeneously into the other aqueous solution, and mixing the so obtained phosphor and pigment dispersions.Type: GrantFiled: November 18, 1977Date of Patent: May 1, 1979Assignee: Dai Nippon Toryo Co., Ltd.Inventors: Katuzo Kanda, Noboru Kotera, Seiji Murakami, Thihiro Yoshida, Shusaku Eguchi, Toshiaki Hatsumi, Kazuhito Iwasaki, Isao Iwamoto
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Patent number: D388510Type: GrantFiled: June 11, 1996Date of Patent: December 30, 1997Assignee: Amway CorporationInventors: Bradley G. Rick, Jonathan Guerra, Seiji Murakami, Kenichi Touma