Patents by Inventor Takashi Nagano

Takashi Nagano 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).

  • Patent number: 5048941
    Abstract: The surgical microscope comprises a stand, an arm movably attached to said stand for sustaining a microscope body, an electric control equipment divided into a plural number of units removably piled up on said stand and a foot switch unit to be used for executing various types of functions. Accommodated in each unit are a function control means having a single specific function or plural specific functions different from those of the other units and an independent power source means connected to said function control means in a relation of 1:1 or in a different combination. The surgical microscope can be designed compact as a whole, has high operability and assures high security during operation. Should a function be lost due to troubles during operation, the surgical microscope prevents the other functions from being influenced by the troubles and allows to speedily restore the lost function.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: September 17, 1991
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Masami Hamada, Hiroshi Fujiwara, Kosaku Tsuboshima, Masahiko Kinukawa, Toshiyuki Tsunoda, Takashi Nagano, Kazyuki Minami, Shigeo Tokunaga, Masanori Kaneda, Tomonori Ishikawa
  • Patent number: 4832474
    Abstract: In order to substantially reduce the time required for examination and to enable the structure of the microscope apparatus for examining a wafer to be made in a compact size, the apparatus comprises a wafer examination unit provided midway on the transportation course of the wafer transporting means for being able to move the wafer under examination independently of the direction of its transporation, and an objective disposed above the wafer examination unit for being able to move along the upper face of the wafer which is held at the position of examination and in a direction different from the direction of the transportation.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: May 23, 1989
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Makoto Yoshinaga, Yoichi Iba, Noriyuki Miyahara, Masami Kawasaki, Terumasa Morita, Takashi Nagano
  • Patent number: 4815832
    Abstract: A tilting device for surgical microscopes comprising: a supporting apparatus composed of a parallelogram link mounted to be movable three-dimensionally on a frame through a mounting member; and a spring connected between another end portion distant from one end portion of a supporting member to support a microscope and the mounting member, in which rotation moment caused by the weight of the microscope with rotation of the center of gravity of the microscope attached to one end portion of the supporting apparatus is adapted to be offset by reverse rotation moment relying on the elasticity of the spring, in order to make it possible to secure a wide working space for operations in spite of a small size, simplify the structure, reduce the cost of manufacture, and perform smooth operation in the best balance.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: March 28, 1989
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takashi Nagano, Takashi Fukaya
  • Patent number: 4807989
    Abstract: A surgical microscope comprises an illuminating light source for observation and/or photographing, an observation optical system, an index projecting optical system and a cornea configuration measuring optical system. The index projecting optical system includes an index which is removably inserted in the illuminating light beam emitted from the illuminating light source and transmitted through an objective of the observation optical system, thereby dispensing with any particular light source for measuring a cornea configuration, and a cornea configuration measuring mode and a photographing mode being automatically changeable by automatically detecting the presence or absence of the index within the optical path of the microscope.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: February 28, 1989
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takashi Nagano, Toshiyuki Tsunoda, Takashi Fukaya
  • Patent number: 4802749
    Abstract: In order to allow the surgical operator and his assistant to make stereoscopic viewing of the region of surgery with a same magnification and in coaxial relationship, the surgical microscope comprises: a common objective lens; a pair of variable magnification optical systems disposed on the image side of the objective lens; and a pair of light beam splitting members disposed on the image side of the pair of variable magnification optical systems, respectively, wherein arrangement is provided so that paired observational optical paths are to be directed to extend respectively in a plurality of directions each having a predetermined angle relative to a plane containing the optical axes of the pair of variable magnification optical systems, within a plane crossing these optical axes at right angles, respectively. The pair of light beam splitting members are constituted as an optical path splitting unit, and the barrel section and the optical path splitting unit are removably coupled to each other.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: February 7, 1989
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takayoshi Togino, Hiroshi Fujiwara, Yutaka Takabayashi, Takashi Nagano, Takashi Fukaya, Kazuyuki Minami, Toshiyuki Tsunoda
  • Patent number: 4763968
    Abstract: In order to allow the assistant also to make an observation of the same region of the object as by the surgical operator in the form of a normal and clear stereoscopic image, and to enable the size of the barrel as well as the price to be about the same as that of an ordinary surgical microscope having two optical axes, the surgical microscope of the invention is arranged so that by the employment of two pairs of prisms each having a polarized light beam splitter section and a total reflection surface, a pair of operator's observational optical systems and a pair of assistant's observational optical systems are used partly in common, and one of the polarized beams so split by the polarized beam splitter section is utilized as the operator's observational light, and the other is utilized as the assistant's observational light.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: August 16, 1988
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kazuyuki Minami, Takashi Nagano, Hiroshi Fujiwara, Takashi Fukaya, Yutaka Takabayashi, Takayoshi Togino
  • Patent number: 4744642
    Abstract: A microscope wherein, in order that the observing position may be variable over a wide range of a sample to be observed without requiring a large objective, the objective optical system is so formed as to be movable in parallel with the sample surface and the light path length between the objective optical system and eyepiece optical system is made variable by moving the objective optical system.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: May 17, 1988
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Makoto Yoshinaga, Yoichi Iba, Noriyuki Miyahara, Masami Kawasaki, Terumasa Morita, Takashi Nagano
  • Patent number: 4659193
    Abstract: An epidark illumination device comprising an optical means whereby a light from a light source is rightly reflected within an entrance plane including an optical axis but is diffused within a plane vertical to the entering plane, a light interrupting plate preventing the light from the light source from directly entering an objective and an iris diaphragm provided near an object to be inspected so as to make a uniform epidark illumination possible and to prevent a stray light from entering an observing optical system.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: April 21, 1987
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Takashi Nagano
  • Patent number: 4543134
    Abstract: The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlorides in a chlorine amount of from 5 to 20% by weight based on 100% of the chloride and antimony sulfate, and occasionally comprises Ti oxide in an amount of from 0.5 to 10 parts.The annealing separator is applied on the decarburization annealed strip, and improves both the magnetic properties and properties of glass film, in the production of a grain-oriented electrical steel sheet.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: September 24, 1985
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Tanaka, Shozaburo Nakashima, Takashi Nagano, Tomoji Kumano, Yoshitaka Hiromae
  • Patent number: 4330348
    Abstract: A method for heating in a pusher-type furnace a continuously cast steel slab for production of a high magnetic flux density, grain-oriented silicon steel sheet, which comprises holding the portion of the slab having the lowest temperature during the heating at 1300.degree. C. or higher for 30 minutes or longer, so that the final temperature of that portion reaches 1330.degree. C. or higher.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: May 18, 1982
    Assignee: Nippon Steel Corporation
    Inventor: Takashi Nagano