Patents Assigned to NUMATA OPTICAL INSTRUMENTS FACTORY
  • Venous valve incising blades, manufacturing method of the same and artery revascularization treatment using the same
    Patent number: 10799259
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: October 13, 2020
    Assignees: NUMATA OPTICAL INSTRUMENTS FACTORY
    Inventors: Takatoshi Furuya, Kenji Numata
  • Venous valve incising blades, manufacturing method of the same and artery revascularization treatment using the same
    Patent number: 9872693
    Abstract: A venous valve incising cutter includes a cutting teeth head, a guide, a wire and a coupling rod that couples the guide and a cutting teeth head, all aligned in a rotation axis thereof. More than four pieces of cutting blades are formed on the outer surrounding surface of the cutting teeth head. Each cutting blade has a roughly triangular pyramid shape such that the three ridge lines are composed of the outer surrounding surface of the cutting teeth head and the two planes formed in the reverse side of the outer surrounding surface and the apex is a knife-point of the cutting blade.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: January 23, 2018
    Assignees: TAKATOSHI FURUYA, NUMATA OPTICAL INSTRUMENTS FACTORY
    Inventors: Takatoshi Furuya, Kenji Numata