Patents by Inventor Takeshi Koitabashi

Takeshi Koitabashi 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).

  • Manufacturing method of optical disc and optical disc
    Patent number: 7801014
    Abstract: An optical disc of a desired thickness is formed by adhering a stamper substrate 20 to an L0 layer substrate 10. Concave/convex portions to transfer fine concave/convex portions for an L1 layer are formed on one principal plane of the stamper substrate 20. After the fine concave/convex portions for the L1 layer were transferred and formed onto an intermediate layer 32 by the stamper substrate 20, the stamper substrate 20 is adhered to the L0 layer substrate 10.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: September 21, 2010
    Assignee: Sony Disc & Digital Solutions Inc.
    Inventors: Yoshihiro Sugiura, Takeshi Koitabashi
  • Manufacturing Method of Optical Disc and Optical Disc
    Publication number: 20080037402
    Abstract: An optical disc of a desired thickness is formed by adhering a stamper substrate 20 to an L0 layer substrate 10. Concave/convex portions to transfer fine concave/convex portions for an L1 layer are formed on one principal plane of the stamper substrate 20. After the fine concave/convex portions for the L1 layer were transferred and formed onto an intermediate layer 32 by the stamper substrate 20, the stamper substrate 20 is adhered to the L0 layer substrate 10.
    Type: Application
    Filed: November 17, 2005
    Publication date: February 14, 2008
    Inventors: Yoshihiro Sugiura, Takeshi Koitabashi
  • Engagement device for an electromagnetic spring-wound clutch
    Patent number: 4819778
    Abstract: An electromagnetic spring-wound clutch is disclosed. An armature plate member to which one end of a coil wound spring is connected is flexibly connected to a guide member rotatably supported on a cover plate by a plurality of leaf springs. The cover plate has a bent portion at its axial terminal end and the guide member is closely fitted against the bent portion to maintained its axial position thereon. Thus, the armature plate is fitted against an axial end of the bent portion due to the recoil strength of the coil wound spring.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: April 11, 1989
    Assignee: Sanden Corporation
    Inventors: Isamu Shirai, Susumu Ujiie, Takeshi Koitabashi