Patents Assigned to Ohta, Inc.
  • Biocompatible titanium implant for medical use
    Patent number: 6544288
    Abstract: A biocompatible implant for medical use having a layer of titanium or titanium alloys on its surface. The implant is electrochemically treated by using it for an anode in an electrolyte solution containing calcium ions so as to produce a layer of hydrated oxides or hydrated oxide gels, or is subject to an anodic treatment. Subsequently the implant is subject to another electrochemical surface treatment where the implant is employed as a cathode so as to yield a layer that involves or is adsorbed with calcium ions, thus forming on the implant a hydrated gel layer that has an excellent ability of forming apatite.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: April 8, 2003
    Assignees: Ohta, Inc.
    Inventors: Akiyoshi Osaka, Satoshi Hayakawa, Kanji Tsuru, Keiko Koyano, Keizo Ohta
  • Biocompatible titanium implant
    Patent number: 5855612
    Abstract: A biocompatible titanium implant with a modified exterior surface having a covering layer that comprises a hydrated titania gel. The exterior surface of the titanium implant is processed by a hydrogen peroxide aqueous solution that contains metal ions which not only promotes a reaction between the titanium implant and the hydrogen peroxide aqueous solution but also provides a high apatite formation ability to the hydrated titania gel on the surface of the implant.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: January 5, 1999
    Assignees: Ohta Inc., Akiyoshi Osaka
    Inventors: Chikara Ohthuki, Akiyoshi Osaka, Hirohisa Iida, Keizo Ohta
  • Walking assistance crutch
    Patent number: 5725005
    Abstract: According to the present invention, there is provided a walking assistance crutch which is comfortable to use, and which can keep a user from falling on his face by its existence even if he falls down by accident.Features in structure of the crutch according to the invention are as follows. More specifically, the crutch comprises a crutch main body including an armpit rest at its upper end, a foot portion at its lower end, and a handle grip at its intermediate portion. A vertical length or width W of the armpit rest is increased, and a portion of the armpit rest to be held beneath a shoulder of a user is formed to have a substantially triangular cross section so that it has curved surfaces which conform with contours of an inner side of an upper arm and a breast side wall of the user.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: March 10, 1998
    Assignee: Ohta Inc. (Ohta Kabushiki Kaisha)
    Inventors: Takuya Yamasaki, Keizo Ohta
  • Stick-like means for physically handicapped person
    Patent number: 5329954
    Abstract: A stick-like apparatus for a physically handicapped person including a grip handle and a forearm supporting rod which rotates together with respect to a main rod so that the user can sit in an easy posture and can easily impose force on the stick-like apparatus when he stands up from a chair or when he goes upstairs.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 19, 1994
    Assignee: Ohta Inc.
    Inventor: Toshiaki Miyoshi