Patents by Inventor Tadashi Fujieda

Tadashi Fujieda 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).

  • Publication number: 20050035896
    Abstract: The purpose of the present invention is to provide an easy-to-manufacture electromagnetic wave absorption material usable from submillimeter wave region to millimeter wave region with an excellent radio wave absorbing performance and a variety of usage thereof. The present invention is characterized by an electromagnetic wave absorption material comprised of a dispersions of at least one of the materials: a multi-layer hollow globule of carbon, a schungite carbon, and the schungite ore; mixed into a matter having a high electrical resistivity. The invention is further characterized by an electronic device, an optical transmission module, an optical reception module, a high frequency telecommunication equipment, and a stop-free automated tollgate system, wherein at least a part of their board, electronic element, and circuit wiring are covered with said electromagnetic wave absorption material.
    Type: Application
    Filed: August 9, 2004
    Publication date: February 17, 2005
    Inventors: Tadashi Fujieda, Kishio Hidaka, Shinzou Ikeda, Mitsuo Hayashibara, Noriyuki Taguchi
  • Patent number: 6833550
    Abstract: The disclosure is concerned with an electron microscope comprising a casing for encasing an assembly and a display disposed to the casing. The assembly comprises a vacuum container, a vacuum pump for evacuating the vacuum container, an electron emitter disposed at the upper position of the vacuum vessel, a sample chamber disposed at the lower position of the vacuum container and capable of projecting from the casing and a detector for detecting an electron beam emitted from a sample placed in the sample chamber.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: December 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuo Hayashibara, Kishio Hidaka, Toshiaki Horiuchi, Tadashi Fujieda, Yoshimichi Numata, Shuuichi Suzuki
  • Patent number: 6818821
    Abstract: An electromagnetic wave absorption material includes a dispersions of at least one of the materials: a multi-layer hollow globule of carbon, a schungite carbon, and the schungite ore; mixed into a matter having a high electrical resistivity. The invention is further characterized by an electronic device, an optical transmission module, an optical reception module, a high frequency telecommunication equipment, and a stop-free automated tollgate system, wherein at least a part of their board, electronic element, and circuit wiring are covered with said electromagnetic wave absorption material.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: November 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Kishio Hidaka, Shinzou Ikeda, Mitsuo Hayashibara, Noriyuki Taguchi
  • Publication number: 20040144922
    Abstract: The disclosure is concerned with an electron microscope comprising a casing for encasing an assembly and a display disposed to the casing. The assembly comprises a vacuum container, a vacuum pump for evacuating the vacuum container, an electron emitter disposed at the upper position of the vacuum vessel, a sample chamber disposed at the lower position of the vacuum container and capable of projecting from the casing and a detector for detecting an electron beam emitted from a sample placed in the sample chamber.
    Type: Application
    Filed: August 20, 2003
    Publication date: July 29, 2004
    Inventors: Mitsuo Hayashibara, Kishio Hidaka, Toshiaki Horiuchi, Tadashi Fujieda, Yoshimichi Numata, Shuuichi Suzuki
  • Publication number: 20040146452
    Abstract: The purpose of the present invention is to provide an easy-to-manufacture electromagnetic wave absorption material usable from submillimeter wave region to millimeter wave region with an excellent radio wave absorbing performance and a variety of usage thereof.
    Type: Application
    Filed: January 14, 2004
    Publication date: July 29, 2004
    Inventors: Tadashi Fujieda, Kishio Hidaka, Shinzou Ikeda, Mitsuo Hayashibara, Noriyuki Taguchi
  • Publication number: 20040036645
    Abstract: In a millimeter wave radar used for the purpose of automatic operation or collision prevention of a vehicle, it is intended to solve the problem that a side lobe of a transmitted electromagnetic wave is reflected by surrounding bodies and the reflected wave is received, with the result that unnecessary bodies may also be detected.
    Type: Application
    Filed: March 19, 2003
    Publication date: February 26, 2004
    Applicant: HITACHI, LTD.
    Inventors: Tadashi Fujieda, Hiroshi Kuroda, Terumi Nakazawa, Mitsushige Suzuki
  • Publication number: 20040026629
    Abstract: The invention provides a high reliability emission source able to secure the ohmic contact of a carbon nanotube and an electrically conductive base material, and having sufficient joining strength and easily making a beam shaft adjustment. The invention also provides an electron microscope for realizing high resolution, high brightness, a reduction in sample damage due to a reduction in acceleration voltage, a reduction in cost and compactness, and an electron beam drawing device for realizing high definition, high efficiency, a reduction in cost and compactness in comparison with the conventional device kind by using this high reliability emission source. Therefore, in the emission source, the carbon nanotube is attached to the tip central portion of the electrically conductive base material through an electrically conductive joining material or an organic material.
    Type: Application
    Filed: August 8, 2003
    Publication date: February 12, 2004
    Inventors: Tadashi Fujieda, Kishio Hidaka, Mitsuo Hayashibara, Shuichi Suzuki, Yoshimichi Numata, Toshiaki Horiuchi
  • Publication number: 20030190498
    Abstract: An object of the present invention is to provide an electromagnetic wave absorber which is excellent in the electromagnetic wave absorbing characteristics in the high frequency range above 1 GHz, and to provide a method of manufacturing the electromagnetic wave absorber and appliances using the electromagnetic wave absorber.
    Type: Application
    Filed: April 9, 2001
    Publication date: October 9, 2003
    Inventors: Tadashi Fujieda, Shinzou Ikeda, Sai Ogawa, Teruyoshi Abe, Yasuhisa Aono
  • Publication number: 20030155143
    Abstract: The purpose of the present invention is to provide an easy-to-manufacture electromagnetic wave absorption material usable from submillimeter wave region to millimeter wave region with an excellent radio wave absorbing performance and a variety of usage thereof.
    Type: Application
    Filed: September 6, 2002
    Publication date: August 21, 2003
    Inventors: Tadashi Fujieda, Kishio Hidaka, Shinzou Ikeda, Mitsuo Hayashibara, Noriyuki Taguchi
  • Publication number: 20030030999
    Abstract: A high dielectric composite material obtained by subjecting submicron particles of an inorganic filler containing a metal as its essential component to an insulating treatment such as a chemical treatment, further subjecting to a surface treatment for improving their compatibility with organic resins, and then dispersing in an organic resin, has a dielectric constant of 15 or above, with its dielectric loss tangent in the frequency region of from 100 MHz to 80 GHz being 0.1 or less, and can therefore be used effectively for multilayer wiring boards and module substrates.
    Type: Application
    Filed: August 7, 2002
    Publication date: February 13, 2003
    Applicant: HITACHI, LTD.
    Inventors: Yuichi Satsu, Akio Takahashi, Tadashi Fujieda, Takumi Ueno, Haruo Akahoshi
  • Publication number: 20020168510
    Abstract: A high dielectric composite material obtained by subjecting submicron particles of an inorganic filler containing a metal as its essential component to an insulating treatment such as a chemical treatment, further subjecting to a surface treatment for improving their compatibility with organic resins, and then dispersing in an organic resin, has a dielectric constant of 15 or above, with its dielectric loss tangent in the frequency region of from 100 MHz to 80 GHz being 0.1 or less, and can therefore be used effectively for multilayer wiring boards and module substrates.
    Type: Application
    Filed: February 5, 2002
    Publication date: November 14, 2002
    Inventors: Yuichi Satsu, Akio Takahashi, Tadashi Fujieda, Takumi Ueno, Haruo Akahoshi
  • Patent number: 5872826
    Abstract: A channel box for a nuclear-reactor fuel assembly (MOX fuel assembly) containing plutonium, capable of properly controlling the excess reactivity without mixing neutron absorber or burnable poison into a fuel rod, and a channel box for a nuclear-reactor fuel assembly which does not form any gap between the channel box and members containing burnable poison in the channel box and in which the burnable poison does not directly contact with reactor water.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: February 16, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Masahisa Inagaki, Iwao Takase, Yoshitaka Nishino, Junichi Yamashita, Akihiro Yamanaka, Kenichi Ito, Junjiro Nakajima, Takehiro Seto
  • Patent number: 5862194
    Abstract: The present invention provides a zirconium based alloy member which has very small deformation of elongation and bow occurring due to irradiation growth, a method of manufacturing it, and particularly an channel box for an atomic reactor fuel assembly. A zirconium based alloy plate member having a width of not less than 100 mm and a long length, containing not more than 5 wt % Nb and/or not more 5 wt % Sn, the member having (0001) orientation (Fl value) of hexagonal Zr with respect to longitudinal direction ranging from 0.20 to 0.35, the difference in Fl between the middle and the end being not more than the value calculated from (0.0935.times.Fl-0.00585) and an amount of bow at neutron irradiation of 35 GWd/t which bow occurs in the channel box for a reactor being not more than 2.16 mm.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: January 19, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Masahisa Inagaki, Iwao Takase, Junjiro Nakajima, Rinichi Asano, Takehiro Seto