Patents by Inventor Kiyoshi Fukai

Kiyoshi Fukai 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: 10623624
    Abstract: An electronic apparatus that achieves a function of a compound eye camera using a plurality of photographing modules and that improves AF accuracy even if environmental conditions vary or even if a state is changed by impact from outside. The electronic apparatus includes two photographing modules. A first obtaining unit performs contrast AF by one of the two photographing modules to obtain a first focus detection result. A second obtaining unit calculates an object distance from parallax information between the two photographing modules to obtain a second focus detection result. A correction unit corrects a calculation result of the object distance obtained by the second obtaining unit in a case where a state of at least one of the two photographing modules and a body of the electronic apparatus varies and where a difference between the first and second focus detection results is more than a threshold.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: April 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yosuke Fukai, Kiyoshi Nitto, Toshihiro Ogawa, Junichiro Iwamatsu
  • Publication number: 20190215456
    Abstract: A digital camera controls a blur correction lens used to correct image blur occurring due to vibration applied to the digital camera. The digital camera controls a focus lens used for focus adjustment and a zoom lens used to change an angle of view in connection with driving of the blur correction lens during exposure to an image sensor.
    Type: Application
    Filed: December 19, 2018
    Publication date: July 11, 2019
    Inventors: Yosuke Fukai, Kiyoshi Nitto, Toshihiro Ogawa, Junichiro Iwamatsu
  • Patent number: 6592645
    Abstract: A process for the production of fine powder of metallic nickel which comprises a first step of dissolving nickel carbonate and/or nickel hydroxide in aqueous ammonia or in an aqueous solution of ammonia and at least one selected from the group consisting of ammonium carbonate, ammonium hydrogencarbonate, a carbonate of an alkali metal and a hydrogencarbonate of an alkali metal to prepare an aqueous solution of a nickel salt; converting the aqueous solution of a nickel salt to a W/O emulsion, and then removing volatile components including ammonia from the droplets to form precipitates of nickel carbonate in the droplets, thereby providing fine spherical particles of nickel carbonate; and a second step of heating the particles of nickel carbonate in the presence of a fusion preventive agent that is a compound of at least one element selected from the group consisting of alkaline earth elements, aluminum, silicon and rare earth elements in an atmosphere of hydrogen, thereby reducing the nickel carbonate to meta
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: July 15, 2003
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Hideto Mizutani, Minoru Yoneda, Toshihiro Sugaya, Hiroyoshi Urasumi, Chiyo Honda, Hiroshi Nakao, Tsutomu Hatanaka, Shinji Ohgama, Kiyoshi Fukai, Kazuhiko Nagano, Shigefumi Kamisaka, Kazunobu Abe
  • Patent number: 6197273
    Abstract: The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I) M(CO3)x/2.(OH)y wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0≦x≦2, 0≦y≦2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: March 6, 2001
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Kazuhiko Nagano, Kazunobu Abe, Shigefumi Kamisaka, Kiyoshi Fukai, Tsutomu Hatanaka, Shinji Ohgama, Hiroshi Nakao, Minoru Yoneda, Hideto Mizutani
  • Patent number: 5507898
    Abstract: A multilayer piezoelectric composite comprising a bonded laminate each layer of which is composed of a green sheet of a low-temperature sintering lead zirconate titanate piezoelectric ceramic. The temperature coefficient of a frequency constant of at least one layer has a polarity opposite to the polarity of those of the other layers. The bonded laminate is sintered at a temperature which does not produce any or almost any interdiffusion between layers so that the absolute value of the temperature coefficient of a frequency constant of the bonded laminate is smaller than the absolute value of the temperature coefficient of a frequency constant of any or one of the layers.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: April 16, 1996
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Masashi Aoki, Kiyoshi Fukai, Kazunobu Abe, Koichiro Sakata, Tadashi Takenaka
  • Patent number: 4414196
    Abstract: A method of producing single crystalline, acicular .alpha.-ferric oxide particles of narrow particle size distribution is provided. The method comprises heating an aqueous suspension of ferric hydroxide at temperatures of 100.degree.-250.degree. C. at an alkaline pH in the presence both a water soluble organic or inorganic compound capable of forming complexes with iron as a growth regulating agent and .alpha.-ferric oxide seed crystals of minor axes not larger than 0.4 microns in average in amounts of 0.1-25 mole % in terms of the Fe content thereof in relation to the ferric hydroxide.
    Type: Grant
    Filed: November 18, 1981
    Date of Patent: November 8, 1983
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiji Matsumoto, Tadashi Koga, Kiyoshi Fukai, Hideji Yamamoto
  • Patent number: 4202871
    Abstract: Single crystalline, acicular ferric oxide particles are produced by maintaining an aqueous suspension of ferric hydroxide at an elevated temperature at an alkaline pH in the presence of an organic phosphonic acid compound or a hydroxycarboxylic acid compound as a growth-regulating agent.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: May 13, 1980
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiji Matsumoto, Tadashi Koga, Kiyoshi Fukai, Shinya Nakatani
  • Patent number: 4116752
    Abstract: Single crystalline, ferrite particles are obtained by the thermal reaction of ferric oxyhydroxide, ferric hydroxide, porous ferric oxide made therefrom or ferric oxide having a particle size less than 0.8.mu. with a strontium or barium compound such as the oxide, hydroxide, the carbonate or the carboxylate in the presence of a small amount of a metal chloride flux such as strontium chloride or barium chloride.The resulting particles have a well-defined, hexagonal plate configuration and are particularly adapted for the production of anisotropic magnets.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: September 26, 1978
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiji Matsumoto, Kiyoshi Fukai
  • Patent number: 4042516
    Abstract: Single crystalline ferrite particles are obtained by the thermal reaction of ferric oxyhydroxide, ferric hydroxide, porous ferric oxide made therefrom or ferric oxide having a particle size less than 0.8.mu. with a strontium or barium compound such as the oxide hydroxide, the carbonate or the carboxylate in the presence of a small amount of a metal chloride flux such as strontium chloride or barium chloride.The resulting particles have a well-defined, hexagonal plate configuration and are particularly adapted for the production of anisotropic magnets.
    Type: Grant
    Filed: November 18, 1975
    Date of Patent: August 16, 1977
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiji Matsumoto, Kiyoshi Fukai