Patents by Inventor Yoshiharu Maezawa

Yoshiharu Maezawa 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: 6251496
    Abstract: A method for producing a magnetic recording medium includes the steps of causing a polymer film having a vapor-deposition surface to run; vaporizing a ferromagnetic metal material; depositing a thin film including the ferromagnetic metal material to the vapor-deposition surface of the polymer film in a vapor-deposition area where the polymer film runs with a tilt angle, with respect to a horizontal direction, in the range of about 20 degrees or more and about 80 degrees or less by oblique vapor deposition.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: June 26, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yoshiharu Maezawa
  • Patent number: 6251230
    Abstract: A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while introducing reaction gas to a thin film forming section from a nozzle consisting of minute tubes, so that the flow of evaporated atoms is not disturbed by the reaction gas.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: June 26, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuyoshi Honda, Yoshiharu Maezawa, Masaru Odagiri, Sadayuki Okazaki
  • Patent number: 6066240
    Abstract: A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while introducing reaction gas to a thin film forming section from a nozzle consisting of minute tubes, so that the flow of evaporated atoms is not disturbed by the reaction gas.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: May 23, 2000
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Kazuyoshi Honda, Yoshiharu Maezawa, Masaru Odagiri, Sadayuki Okazaki
  • Patent number: 5985423
    Abstract: A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while introducing reaction gas to a thin film forming section from a nozzle consisting of minute tubes, so that the flow of evaporated atoms is not disturbed by the reaction gas.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: November 16, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuyoshi Honda, Yoshiharu Maezawa, Masaru Odagiri, Sadayuki Okazaki
  • Patent number: 5962066
    Abstract: A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while introducing reaction gas to a thin film forming section from a nozzle consisting of minute tubes, so that the flow of evaporated atoms is not disturbed by the reaction gas.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: October 5, 1999
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Kazuyoshi Honda, Yoshiharu Maezawa, Masaru Odagiri, Sadayuki Okazaki
  • Patent number: 5759710
    Abstract: A method and a device for manufacturing a thin film by a vacuum deposition method, and a magnetic recording medium produced thereby are disclosed. A thin film of high quality is mass-produced while introducing reaction gas to a thin film forming section from a nozzle consisting of minute tubes, so that the flow of evaporated atoms is not disturbed by the reaction gas.
    Type: Grant
    Filed: August 10, 1995
    Date of Patent: June 2, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuyoshi Honda, Yoshiharu Maezawa, Masaru Odagiri, Sadayuki Okazaki
  • Patent number: 5604029
    Abstract: A magnetic recording media is manufactured which includes a composite polymer film, which is formed of a flat surfaced polymer film and both inorganic particles and organic particles dispersed on and attached to the surface of the polymer film, and a magnetic film disposed over the particles which are attached on the surface of said composite polymer film. The magnetic recording media satisfies the performance requirements of magnetic recording media in a balanced manner including electromagnetic conversion characteristics, picture drop out performance, and running characteristics of magnetic recording tapes, and at the same time maintaining the foregoing performance characteristics even after repeated use of the magnetic recording tapes.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: February 18, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiharu Maezawa, Kazuyoshi Honda
  • Patent number: 5186977
    Abstract: In a method for manufacturing a functional thin film by a vacuum evaporation method, during a thin film containing a material is evaporation-deposited on a substrate, a gas flow controls orientation of the material in a manner that the gas flow substantially intersects direction of flow of vapor of said material onto the substrate.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: February 16, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiharu Maezawa, Norimoto Nouchi
  • Patent number: 3956185
    Abstract: A catalyst for exhaust gas purification comprises a carrier consisting of acid- and high temperature-resistant silica fibers, a first silica layer deposited on surfaces of the silica fibers, and a second heat-resistant material layer deposited on surfaces of the first silica layer, and a catalyst of noble metals, metals or metal oxides deposited on surfaces of the carrier.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: May 11, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: June Yagi, Harutoki Nakamura, Yoshiharu Maezawa