Patents by Inventor Seiichi Soeda

Seiichi Soeda 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).

  • Golf club head and method for producing the same
    Patent number: 6099414
    Abstract: The present invention provides a golf club head comprising: a face section made of a low specific gravity metal not higher than 5; and a back face section made of a clad material in which the low specific gravity metal and a high specific gravity metal not lower than 7 are metallurgically bonded to each other in advance, wherein the low specific gravity metal of the face section and the low specific gravity metal of the clad material are integrally joined to each other by welding so as to form a club head. In this case, the methods of welding of TIG, plasma arc and laser beams are used in which a U-shaped and/or V-shaped groove is formed. In this golf club head, it is possible to improve the mechanical strength of the joint portion, and it is also possible to produce the golf club head in a short period of time.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: August 8, 2000
    Assignees: Nippon Steel Corporation, Fourteen Co., Ltd, Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akihiko Kusano, Seiichi Soeda, Masaya Fukuda, Shigeru Chino, Takamitsu Takebayashi, Kenichi Miyazawa, Etsuji Kakimoto
  • High strength, high ductility titanium-alloy and process for producing the same
    Patent number: 6063211
    Abstract: A high strength, high ductility titanium alloy comprising O, N and Fe as strengthening elements and the balance substantially Ti, the contents of the strengthening elements satisfying the following relationships (1) to (3):(1) from 0.9 to 2.3% by weight of Fe,(2) up to 0.05% by weight of N, and(3) an oxygen equivalent value Q, which is defined by the formula mentioned below, of 0.34 to 1.00Q=[O]+2.77[N]+0.1[Fe]wherein [O] is an oxygen content (% by weight), [N] is a nitrogen content (% by weight) and [Fe] is an iron content (% by weight), the titanium alloy having a tensile strength of at least 700 MPa and an elongation of at least 15%. Part of Fe may be replaced with Cr and/or Ni. Fe, Cr and Ni may be introduced from a carbon steel or stainless steel, or they may be introduced from sponge titanium containing these elements.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 16, 2000
    Assignees: Nippon Steel Corporation, Toho Titanium Co., Ltd.
    Inventors: Seiichi Soeda, Hideki Fujii, Hiroyuki Okano, Michio Hanaki
  • Marine structure having superior corrosion resistance
    Patent number: 5193939
    Abstract: A marine structure has a surface corrosion resistant covering material of titanium-clad steel plates that are continuously arranged in vertical and horizontal directions. Long sides of the titanium-clad steel plates at the top and bottom steps of the corrosion resistant covering material are horizontally arranged to minimize the number of joints between adjacent titanium-clad steel plates, and a space exposed at an end of each joint at the top and bottom steps of the corrosion resistant covering material is closed with a sealing cover.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: March 16, 1993
    Assignees: Nippon Steel Corporation, Trans-Tokyo Bay Highway Corporation
    Inventors: Taiji Nagatani, Seiichi Soeda, Kazuo Sakai, Yasuo Takahashi