Patents by Inventor Koji Take

Koji Take 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).

  • Heat-assisted magnetic recording medium and magnetic storage apparatus
    Patent number: 10614849
    Abstract: A heat-assisted magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L10 crystal structure and first and second layers, arranged in this order. Each of the first and second layers has a granular structure including C, SiO2, and BN at grain boundaries. Vol % of the grain boundaries in each of the first and second layers is 25 to 45 vol %. Vol % of C in the first layer is 5 to 22 vol %, and a volume ratio of SiO2 with respect to BN in each of the first and second layers is 0.25 to 3.5. Vol % of SiO2 in the second layer is greater than that of the first layer by 5 vol % or more. Vol % of BN in the second layer is smaller than that in the first layer by 2 vol % or more.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: April 7, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Takayuki Fukushima, Koji Take, Hisato Shibata, Takehiro Yamaguchi, Tomoo Shige, Lei Zhang, Chen Xu, Yuji Umemoto, Hiroshi Koyanagi, Kazuya Niwa, Tetsuya Kanbe
  • HEAT-ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS
    Publication number: 20200075053
    Abstract: A heat-assisted magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L10 crystal structure and first and second layers, arranged in this order. Each of the first and second layers has a granular structure including C, SiO2, and BN at grain boundaries. Vol % of the grain boundaries in each of the first and second layers is 25 to 45 vol %. Vol % of C in the first layer is 5 to 22 vol %, and a volume ratio of SiO2 with respect to BN in each of the first and second layers is 0.25 to 3.5. Vol % of SiO2 in the second layer is greater than that of the first layer by 5 vol % or more. Vol % of BN in the second layer is smaller than that in the first layer by 2 vol % or more.
    Type: Application
    Filed: July 23, 2019
    Publication date: March 5, 2020
    Inventors: Takayuki FUKUSHIMA, Koji TAKE, Hisato SHIBATA, Takehiro YAMAGUCHI, Tomoo SHIGE, Lei ZHANG, Chen XU, Yuji UMEMOTO, Hiroshi KOYANAGI, Kazuya NIWA, Tetsuya KANBE
  • Abrasive water jet cutting apparatus
    Patent number: 4872293
    Abstract: For cutting sheet metal or other work by means of a jet of water containing abrasive particles, an abrasive water jet nozzle assembly is provided to which there are separately supplied highly pressurized water and an abrasive suspension. The abrasive suspension is such that abrasive particles with an average size of up to 100 microns are held in suspension in water. The abrasive suspension is introduced into the ejected water by virtue of a partial vacuum created in the nozzle assembly by the pressurized water. The nozzle assembly directs the resulting mixture as an abrasive water jet against the work for cutting thereof. Preferably, the abrasive water jet is recovered for recirculation back to the nozzle assembly as an abrasive suspension of controlled abrasive concentration. Various constructions of the nozzle assembly and various recovery systems are also disclosed.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: October 10, 1989
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Wataru Yasukawa, deceased, Masanori Kiyoshige, Takeshi Horikawa, Tomonobu Okada, Tadafumi Ochi, Yoshiaki Aoki, Masahiko Higashida, Takashi Kawashima, Shigeki Koe, Hideo Ono, Kanta Nihei, Syunji Takasugi, Koji Take