Katsuhito Yoshida, Yasunobu Ogata, Junichi Shiraishi, Tetsuo Nakai: Polycrystal diamond tool. Sumitomo Electric, McDermott Will & Emery, October 16, 2001: US06302225 (73 worldwide citation)

A polycrystal diamond tool is provided whose heat resistance, strength and anti-adhesion property are improved by modifying the porosity of a diamond sintered compact and which comprises a diamond sintered compact, sintered under ultra-high pressure and high temperature, brazed onto a tool substrate ...

Mitsuhiro Kudo, Shinji Takayama, Yoshizo Sawada, Yasunobu Ogata: Amorphous alloys. Hitachi Metals, Hitachi, Parkhurst & Oliff, May 26, 1987: US04668310 (70 worldwide citation)

Amorphous alloys having high strength, high hardness, high crystallization temperature, high saturation magnetic induction, low coercive force, high magnetic permeability and particularly low deterioration of magnetic properties with lapse of time, have a composition formula of

Yasunobu Ogata: Switching regulator. Hitachi Metals, Antonelli Terry & Wands, May 29, 1984: US04451876 (25 worldwide citation)

A switching regulator of the magnetic amplifier type comprises a saturable reactor whose core ismade by winding a sheet of an amorphous metallic magnetic material into a toroidal form. The sheet thickness of the amorphous material is preferably between 4 .mu.m and 60 .mu.m so that a coercive force h ...

Yasunobu Ogata, Satoru Kukino, Yasuyuki Kanada, Junichi Shiraishi, Tetsuo Nakai: Diamond sintered body having high strength and high wear resistance, and tool including the same. Sumitomo Electric, W F Fasse, W G Fasse, July 17, 2001: US06261329 (17 worldwide citation)

A diamond sintered body having high wear resistance, chipping resistance, shock resistance and thermal conductivity is provided. The diamond sintered body includes sintered diamond particles and a sintering aid as the remainder. The content of the sintered diamond particles is at least 80% by volume ...


Takashi Meguro, Yoshizo Sawada, Yasunobu Ogata: Magnetic head alloy material and method of producing the same. Hitachi Metals, Antonelli Terry & Wands, April 8, 1986: US04581080 (14 worldwide citation)

An alloy material for magnetic head which ensures, when formed into a head, reduced distortion during writing and reduced level of noises such as sliding noise, while presenting high wear resistance.

Yasunobu Ogata, Koichiro Kurihara, Mitusuke Masaka, Kouji Hatanaka: Glow plug for diesel engines. Hitachi Metals, Jidosha Kiki, McGlew & Tuttle, June 5, 1990: US04931619 (14 worldwide citation)

A glow plug for diesel engines in which a ceramic heater is supported, with the one end thereof cantilevered toward the outside, by the tip of a hollow holder; the ceramic heater is composed of a U-shaped heating portion and a pair of leads extending backwards from both ends of the U-shaped heating ...

Shinji Takayama, Yasuo Tsukuda, Kazuo Shiiki, Shigekazu Otomo, Mitsuhiro Kudo, Yasunobu Ogata, Yoshizo Sawada: Ferromagnetic amorphous alloy. Hitachi, Hitachi Metals, Hitachi Research Dev, Craig and Antonelli, December 22, 1981: US04306908 (13 worldwide citation)

A ferromagnetic amorphous alloy having a composition represented by (Co.sub.x Ni.sub.y Fe.sub.z).sub.a M.sub.b G.sub.c, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x, y, z and a, b, c are selected to meet the conditions of x=1-y-z, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.7, a=1-b-c, 0 ...

Takashi Takami, Yutaka Kubota, Yasunobu Ogata: Ferrite magnet and method for producing same. Hitachi Metals, Sughrue Mion Zinn Macpeak & Seas PLLC, September 28, 1999: US05958284 (8 worldwide citation)

The ferrite magnet having a composition represented by the general formula: (A.sub.1-x R.sub.x)O.multidot.n�(Fe.sub.1-y M.sub.y).sub.2 O.sub.3 ! (by atomic ratio), wherein A is Sr and/or Ba, R is at least one element selected from the group consisting of La, Nd, Pr, Sm, Eu and Gd, La being indispens ...

Takashi Takami, Yasunobu Ogata: Ferrite sintered magnet. Neomax, Sughrue Mion PLLC, March 15, 2011: US07906036 (6 worldwide citation)

A sintered ferrite magnet having a basic composition represented by the general formula: A1−x−y+aCax+bRy+cFe2n−zCoz+dO19 (atomic ratio), wherein a, b, c and d represent the amounts of an A element, Ca, an R element and Co added in the pulverization step of an oxide magnet material, which are numeral ...