Patents by Inventor Shinji Tsujimoto

Shinji Tsujimoto 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).

  • Publication number: 20030007286
    Abstract: A marking method for a sintered product of the invention includes forming a concave portion on the sintered product by irradiating the sintered product with laser light thereby to write identification information on the sintered product. The depth of the concave portion is adjusted in a range between 0.1 &mgr;m and 5 &mgr;m, inclusive.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 9, 2003
    Applicant: SUMITOMO SPECIAL METALS CO., LTD.
    Inventors: Shinji Tsujimoto, Takayuki Morikawa
  • Patent number: 6449123
    Abstract: A marking method for a sintered product of the invention includes forming a concave portion on the sintered product by irradiating the sintered product with laser light thereby to write identification information on the sintered product. The depth of the concave portion is adjusted in a range between 0.1 &mgr;m and 5 &mgr;m, inclusive.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: September 10, 2002
    Assignee: Sumitomo Special Metals Co., Ltd.
    Inventors: Shinji Tsujimoto, Takayuki Morikawa
  • Patent number: 5595946
    Abstract: Substrate materials for magnetic heads consisting of 24-75 mol % of .alpha.-Al.sub.2 O.sub.3 and the remaining 76-25 mol % of TiC.sub.X O.sub.Y N.sub.Z, or TiC.sub.X O.sub.Y N.sub.Z containing a small amount of additives, that has a NaCl-type structure which retain known characteristics required on such materials and have controlled sizes of crystallites of Al.sub.2 O.sub.3 and TiC.sub.X O.sub.Y N.sub.Z, uniformly dispersed TiC.sub.X O.sub.Y N.sub.Z crystallites and, if any, additive elements, in which internal stress is relieved. The materials are intended for eliminating problems in machining to form steps and thus for fabricating high-precision thin-film heads for high-density recording.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: January 21, 1997
    Assignees: Sumitomo Special Metals Co., Ltd., Nippon Tungsten Co., Ltd.
    Inventors: Shinji Tsujimoto, Shin Mishima, Shigeru Kawahara, Shigeki Mohri, Toyoshige Sasaki, Michito Miyahara, Osamu Nakano
  • Patent number: 5595947
    Abstract: Substrate materials for magnetic heads consisting of 24-75 mol % of .alpha.-Al.sub.2 O.sub.3 and the remaining 76-25 mol % of TiC.sub.x O.sub.y N.sub.z containing a small amount of additives, that has a NaCl-type structure which retain known characteristics required on such materials and have controlled sizes of crystallites of Al.sub.2 O.sub.3 and TiC.sub.x O.sub.y N.sub.z, uniformly dispersed TiC.sub.x O.sub.y N.sub.z crystallites and, if any, additive elements, in which internal stress is relieved. The materials are intended for eliminating problems in IBE to form steps and thus for fabricating high-precision thin-film heads for high-density recording.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: January 21, 1997
    Assignees: Sumitomo Special Metals Co., Ltd., Nippon Tungsten Co. Ltd.
    Inventors: Shinji Tsujimoto, Shin Mishima, Shigeru Kawahara, Toshiaki Wada, Michito Miyahara, Toyoshige Sasaki, Shigeki Mohri, Osamu Nakano