Patents by Inventor Akira Nakahira

Akira Nakahira 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).

  • Semiconductor device with reduced amount of sealing resin
    Patent number: 6011302
    Abstract: A semiconductor device includes a resin case for covering a semiconductor element, and main terminal frames for externally guiding electrodes of the semiconductor element. The main terminal frames with different polarities are installed inside the resin case such that relative positions thereof are offset in a vertical direction to form upper and lower sides. Main terminal pieces are connected to the respective terminal frames to protrude vertically from a top surface of the resin case. The main terminal pieces have rising bases connected to the terminal fames, wherein the rising base and the terminal frame connected thereto which are located at the upper side are sealed with a material same as the resin case. A gel sealing resin is charged into the resin case to seal at least one terminal frame installed at the lower side.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: January 4, 2000
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Akira Nakahira
  • Roll for use in heat treating furnace and method of producing the same
    Patent number: 5161306
    Abstract: In order to prevent production of build-up resistance and wear resistance on a roll for use in heat treating furnace effectively, an alloy layer, a cermet sprayed layer having reinforced zone and a chemical conversion coating are provide in this order on a roll substrate to form a multi-coating layer.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: November 10, 1992
    Assignee: Tocalo Co., Ltd.
    Inventors: Akira Nakahira, Yoshio Harada, Noriyuki Mifune
  • Roll for use in heat treating furnace and method of producing the same
    Patent number: 5070587
    Abstract: In order to prevent production of build-up resistance and wear resistance on a roll for use in heat treating furnace effectively, an alloy layer, a cermet sprayed layer having reinforced zone and a chemical conversion coating are provide in this order on a roll substrate to form a multi-coating layer.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: December 10, 1991
    Assignee: Tocalo Co., Ltd.
    Inventors: Akira Nakahira, Yoshio Harada, Noriyuki Mifune
  • Semi-conductor element with terminal casing
    Patent number: D364384
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: November 21, 1995
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tomio Shimizu, Akira Nakahira, Shinichi Kobayashi, Katsumi Yamada
  • Semi-conductor element with terminal casing
    Patent number: D364385
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: November 21, 1995
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tomio Shimizu, Akira Nakahira, Rikihiro Maruyama, Toshifusa Yamada, Takao Nagasawa