Patents by Inventor Masayuki Namiki

Masayuki Namiki 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).

  • Patent number: 6051705
    Abstract: The present invention relates to a substituted thiazolo[3,2-a] azepine derivative having inhibitory activity against angiotensin I converting enzyme and neutral endpeptidase and is represented by the following general formula (I): ##STR1##
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: April 18, 2000
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Shinji Suda, Naoki Yoneda, Makoto Kotake, Masanori Mizuno, Tomohiro Matsushima, Yoshio Fukuda, Mamoru Saito, Toshiyuki Matsuoka, Hideyuki Adachi, Masayuki Namiki, Takeshi Sudo, Kazutoshi Miyake, Makoto Okita
  • Patent number: 5789403
    Abstract: The present invention relates to a substituted thiazolo?3,2-a!azepine derivative having inhibitory activity against angiotensin I converting enzyme and neutral endpeptidase.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: August 4, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Shinji Suda, Naoki Yoneda, Makoto Kotake, Masanori Mizuno, Tomohiro Matsushima, Yoshio Fukuda, Mamoru Saito, Toshiyuki Matsuoka, Hideyuki Adachi, Masayuki Namiki, Takeshi Sudo, Kazutoshi Miyake, Makoto Okita
  • Patent number: 5679671
    Abstract: The present invention relates to an amino acid derivative having an angiotensin I-converting enzyme inhibition activity, a vasopressin antagonism and an atrial natriuretic peptide hydrolase inhibition activity.This amino acid derivative is represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or an acyl group; R.sup.2 represents a hydrogen atom, a lower alkyl group, a cycloalkyl group, an ary group which may have a substituent, a heteroaryl group which may have a substituent, an arylalkyl group which may have a substituent or a heteroarylalkyl group which may have a substituent;m and n represent each independently an integer of 0, 1 or 2 andJ represents a cyclic group having an angiotensin I-converting enzyme inhibition activity.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: October 21, 1997
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Shinji Suda, Naoki Yoneda, Makoto Kotake, Kenji Hayashi, Kazutoshi Miyake, Nobuyuki Mori, Mamoru Saito, Toshiyuki Matsuoka, Masayuki Namiki, Takeshi Sudo, Shigeru Souda
  • Patent number: 4875011
    Abstract: Two Hall effect devices are formed on a major surface of a silicon single crystal substrate lying in parallel to the (100) crystalline plane and series-connected to form a magnetic sensor. Each of the Hall effect devices has a pair of drive electrodes spaced apart from each other in a direction substantially parallel to the <100> or <010> crystalline axis and held at different potentials for flowing therebetween a drive current in said direction to drive the Hall effect device and a pair of Hall terminals for developing a Hall voltage when exposed to an external magnetic field. A comparator compares the potentials of two selected Hall terminals of the different Hall devices with each other to produce a compared signal. A switching element is connected to one of the Hall devices to control the potential of the Hall terminals to equalize the potentials of the two selected Hall terminals in response to the compared signal.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: October 17, 1989
    Assignee: Seiko Instruments Inc.
    Inventors: Masayuki Namiki, Masanori Gouda, Masaaki Kamiya
  • Patent number: 4739264
    Abstract: Two Hall effect devices are series-connected to form a magnetic sensor. Each of the Hall effect devices has a pair of Hall terminals for developing a Hall voltage when exposed to an external magnetic field. A comparator compares the potentials of two selected Hall terminals of the different Hall devices with each other to produce a compared signal. A switching element is connected to one of the Hall devices to control the potential of the Hall terminals to equalize the potentials of the two selected Hall terminals in response to the compared signal. Two non-selected Hall terminals develop positive and negative Hall voltages, respectively, relative to the selected Hall terminals so that the magnetic sensor produces a totalized Hall voltage of the two Hall effect devices.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: April 19, 1988
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventors: Masaaki Kamiya, Masayuki Namiki
  • Patent number: 4639755
    Abstract: A thermosensitive semiconductor device has a semiconductor substrate of one conductivity type which is used as the common collector of at least two Darlington-connected transistors. The base of the first stage transistor is connected to the common collector to form a first terminal and the emitter of the final stage transistor forms a second terminal. A constant current source is connected between the first and second terminals. To reduce deviations in the temperature response, a second collector region can be used and which can extend to a depth deeper than the depth of the emitter of the final stage transistor to absorb some of the carriers injected by the emitter.
    Type: Grant
    Filed: August 31, 1982
    Date of Patent: January 27, 1987
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masayuki Namiki, Masaaki Kamiya, Yoshikazu Kojima, Kojiro Tanaka
  • Patent number: 4395139
    Abstract: A temperature detecting device comprises a semiconductor diode temperature sensor having a resistance characteristic which varies with variations in temperature, and a constant current circuit connected in series. A power source is connected in parallel with the series circuit and connected in parallel with a constant voltage circuit. A resistance ladder circuit is connected between an output terminal of the constant voltage circuit and one terminal of the power source, and an output terminal of the resistance ladder circuit is connected to a first input terminal of a differential amplifier. A second input terminal of the differential amplifier is connected to a connection point of the semiconductor diode and the constant current circuit.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: July 26, 1983
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masayuki Namiki, Masaaki Kamiya, Yoshikazu Kojima, Kojiro Tanaka