Patents by Inventor Hirofumi Tsuchiya

Hirofumi Tsuchiya 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).

  • Bias tee circuit and PoC circuit using the same
    Patent number: 11978941
    Abstract: Disclosed herein is a bias tee circuit connected between a common terminal and power supply and signal terminals, the bias tee circuit includes a capacitor inserted between the common terminal and the signal terminal, and first and second inductors inserted in series between the common terminal and the power supply terminal. The first inductor is connected on a side of the common terminal. The second inductor is connected on a side of the power supply terminal. The second inductor is higher in self-resonance frequency and lower in Q value than the first inductor.
    Type: Grant
    Filed: August 11, 2021
    Date of Patent: May 7, 2024
    Assignee: TDK CORPORATION
    Inventors: Shuhei Someya, Mitsuyuki Nara, Katsufumi Ehata, Shinichi Tsuchiya, Hirofumi Tomita, Yoshinobu Shimokura
  • Phosphor-containing cured silicone, process for production of same, phosphor-containing silicone composition, precursor of the composition, sheet-shaped moldings, LED package, light-emitting device, and process for production of LED-mounted substrate
    Patent number: 9193833
    Abstract: A phosphor-containing cured silicone that is a cured silicone which has a structure represented by general formulae (1) and/or (2) and also has units selected from general formulae (3) and/or (4), the phosphor-containing cured silicone includes a phosphor and particles having units selected from general formulae (3) and/or (4): wherein R1 to R3 are each a hydrogen atom, a methyl group, an ethyl group or a propyl group; X represents a methylene group, a dimethylene group or a trimethylene group, and may be the same or different; and R4 to R6 are each a substituted or unsubstituted monovalent hydrocarbon group, and may be the same or different. An object of the present invention is to provide a cured silicone in which a phosphor is uniformly dispersed, the cured silicone is characterized in that a silicone material has good thermal resistance and lightfastness.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: November 24, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Kazuki Goto, Tetsuya Goto, Masuichi Eguchi, Takao Kitagawa, Kazunari Kawamoto, Yutaka Ishida, Hirofumi Tsuchiya, Takayoshi Akamatsu
  • PHOSPHOR-CONTAINING CURED SILICONE, PROCESS FOR PRODUCTION OF SAME, PHOSPHOR-CONTAINING SILICONE COMPOSITION, PRECURSOR OF THE COMPOSITION, SHEET-SHAPED MOLDINGS, LED PACKAGE, LIGHT-EMITTING DEVICE, AND PROCESS FOR PRODUCTION OF LED-MOUNTED SUBSTRATE
    Publication number: 20130125365
    Abstract: A phosphor-containing cured silicone that is a cured silicone which has a structure represented by general formulae (1) and/or (2) and also has units selected from general formulae (3) and/or (4), the phosphor-containing cured silicone includes a phosphor and particles having units selected from general formulae (3) and/or (4): wherein R1 to R3 are each a hydrogen atom, a methyl group, an ethyl group or a propyl group; X represents a methylene group, a dimethylene group or a trimethylene group, and may be the same or different; and R4 to R6 are each a substituted or unsubstituted monovalent hydrocarbon group, and may be the same or different. An object of the present invention is to provide a cured silicone in which a phosphor is uniformly dispersed, the cured silicone is characterized in that a silicone material has good thermal resistance and lightfastness.
    Type: Application
    Filed: February 9, 2011
    Publication date: May 23, 2013
    Inventors: Kazuki Goto, Tetsuya Goto, Masuichi Eguchi, Takao Kitagawa, Kazunari Kawamoto, Yutaka Ishida, Hirofumi Tsuchiya, Takayoshi Akamatsu
  • Meter instrument panel
    Patent number: D730947
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: June 2, 2015
    Assignee: Iseki & Co., Ltd.
    Inventors: Kazunori Fukuchi, Takehumi Kato, Hirofumi Tsuchiya, Teruki Matsukawa, Narutoshi Ishioka