Patents by Inventor Naoto Okazaki

Naoto Okazaki 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: 5019875
    Abstract: This invention is for improving the radiation hardness or radiation resistance of GaAs MESFETs. According to this invention, an n-type active layer is formed by doping GaAs crystal evenly in the depth direction of the GaAs crystal, and a Schottky gate electrode is provided on the active layer, so that the carrier concentration in the active layer and the thickness of the active layer are set to required values. According to this invention, not only in the case of a total dose of exposure radiation of R=1.times.10.sup.9 roentgens but also in the case of a higher total dose, at least one of the threshold voltage V.sub.th of the GaAs MESFET, the saturated drain current I.sub.dss thereof, and the transconductance g.sub.m will remain in their tolerable ranges. Consequently a semiconductor device comprising the GaAs MESFET and a signal processing circuit cooperatively combined therewith can operate normally as initially designed, with the result of conspicuously improved radiation hardness.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: May 28, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masanori Nishiguchi, Naoto Okazaki
  • Patent number: 4829179
    Abstract: A surface analyzer for analyzing physical properties of the surface of a sample by means of PELS (Proton energy loss spectroscopy) in which accelerated ion beams such as proton beams impinge on the sample in the vertical direction to the surface of the sample and ion beams scattered from the sample are decelerated and then detected by an analyzer to analyze the energy loss of the ion beams. The surface analyzer comprises an ion beam source for generating ion beams, deflecting means for deflecting the ion beams from the ion beam source, irradiating the surface of the sample with the ion beams from the ion beam source in the vertical direction to the surface of the sample, and deflecting scattered ion beams from the sample, accelerating and decelerating means for accelerating the ion beams before the ion beams impinge on the sample and decelerating the scattered ion beams, and analyzing means for detecting the scattered beams and analyzing energy loss of the ion beams.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: May 9, 1989
    Assignee: Nissin Electric Company, Limited
    Inventors: Masahiko Aoki, Masashi Konishi, Yasuhiro Matsuda, Naoto Okazaki
  • Patent number: 4812310
    Abstract: A preserving solution for blood or packed blood cells comprising an anticoagulant solution containing citric acid, sodium citrate and glucose; an effective amount of glycerin; and an effective amount of mannitol. The use of the blood preserving solution makes it possible to preserve blood at a low temperature of from the freezing temperature of plasma (about -1.degree. C.) to 3.degree. C. and to extend the period of preservation to 4 or 5 weeks without any further special additives.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: March 14, 1989
    Assignee: Toru Sato
    Inventors: Toru Sato, Naoto Okazaki, Katsumi Hiyoshi
  • Patent number: 4686974
    Abstract: Steady insufflation of a gas starts before the beginning of each inhalation, and a pulse-like peak flow insufflation of the gas is superposed on the steady insufflation for a short period of times at the beginning of the inhalation, and the steady insufflation is terminated before the end of the inhalation, so as to improve the inhalation efficiency of insufflated gas extremely.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: August 18, 1987
    Assignee: Tottori University
    Inventors: Toru Sato, Naoto Okazaki, Toshihisa Hasegawa, Katsumasa Fujii, Kazukiyo Takano
  • Patent number: 4681099
    Abstract: A breath-synchronized concentrated-oxygen supplier comprising an oxygen concentrator for producing and storing oxygen-enriched gas, and a buffer tank having an inlet connected to the oxygen concentrator and an outlet for temporarily storing the oxygen-enriched gas obtained from the concentrator. A valve is mounted in the outlet of the buffer tank so as to control flow of the oxygen-enriched gas from the buffer tank to the respiratory system of a living body, the valve having a gas flow path that is open to the atmosphere. A sensor, provided for sensing the respiration of the living body, generates an output signal indicative of the inhalation and exhalation phases of the respiration. An input device, on which a ratio between the entire length of the inhalation phase and a specific end portion thereof is set is included as is a regulator responsive to the sensor and input device for detecting the duration of each inhalation phase in succession based on the output signal from the sensor.
    Type: Grant
    Filed: November 13, 1985
    Date of Patent: July 21, 1987
    Assignee: Tottori University
    Inventors: Toru Sato, Naoto Okazaki, Katsumasa Fujii