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Yasuo Yamanaka

Ricoh Company: 19 patents #1,131 of 9,818Top 15%
GJ Gkn Driveline Japan: 6 patents #1 of 25Top 4%
📍 Tochigi, JP: #143 of 2,789 inventorsTop 6%
Overall (All Time): #163,690 of 4,157,543Top 4%
25
Patents All Time

Issued Patents All Time

Showing 1–25 of 25 patents

Patent #TitleCo-InventorsDate
10385928 Clutch with reduced load on edges Hideyuki Inose 2019-08-20
10308113 Differential gear Hideyuki Inose, Yasushi Nagamori 2019-06-04
9797495 Clutch and differential device with same Hideyuki Inose, Atsushi Maruyama 2017-10-24
9695922 Clutch device and differential device with reduced friction loss Atsushi Maruyama 2017-07-04
8926471 Differential device Atsushi Maruyama 2015-01-06
8858384 Bevel gear and differential device therewith Masaaki Fusegi 2014-10-14
8824035 Molded plastic part, method for molding plastic part, and optical scanning device using the molded plastic part Takamichi Ohhashi, Akio Hirano, Eiichi Hayashi, Go Takahashi, Kan Aoki 2014-09-02
8796363 Flame retardant resin composition and molded product Tadakatsu Harada, Yasuyuki Matsushita, Kazuhiko Fukushima 2014-08-05
8749863 Plastic article, method of shaping plastic article, and optical scanning device having plastic article Takamichi Ohhashi, Eiichi Hayashi, Go Takahashi 2014-06-10
8481618 Fire retardant resin composition Tadakatsu Harada, Hidekazu Yaginuma, Yoshiyuki Nishio, Dan Aoki 2013-07-09
8445628 Copolymer resin composition, molded product, and method of manufacturing a copolymer resin composition Tadakatsu Harada, Hidekazu Yaginuma, Masanobu Munekata, Kenji Tajima, Yasuharu Satoh +1 more 2013-05-21
7872813 Optical element, optical scanning device, and image forming apparatus Tomonori Kimura, Eiichi Hayashi 2011-01-18
7794643 Apparatus and method for molding object with enhanced transferability of transfer face and object made by the same Jun Watanabe, Kiyotaka Sawada, Keiji Ueda, Yasunori Sugimoto 2010-09-14
7525710 Scanning and imaging optical system, optical scanner, and image forming apparatus with lenses of different signs and refractive index distribution increasing toward rim Hiromichi Atsuumi 2009-04-28
7135139 Method and mold assembly for producing a molded object Toshihiro Kanematsu 2006-11-14
6919120 Plastic molding and a method and a mold assembly for producing the same Jun Watanabe, Kiyotaka Sawada, Toshiharu Hatakeyama, Hidenobu Kishi 2005-07-19
6893586 Plastic optical element, plastic optical element producing method and plastic optical element producing apparatus Jun Watanabe, Kiyotaka Sawada 2005-05-17
6875380 Method and apparatus for manufacturing plastic optical element and plastic optical element Hidenobu Kishi, Jun Watanabe, Kiyotaka Sawada, Toshiharu Hatakeyama 2005-04-05
6810303 INJECTION MOLD, A PRODUCTION METHOD THEREOF, A PRODUCTION SYSTEM THEREOF, A DESIGNING APPARATUS AND A DESIGNING COMPUTER PROGRAM THEREOF, AN INJECTION METHOD, A MOLDED COMPONENT, AND AN OPTICAL SYSTEM THEREWITH Eiri Sagae, Hiroyuki Endoh, Toshiyuki Iseki, Kohei Shimbo, Yutaka Kaneko 2004-10-26
6793868 Plastic molding and method and apparatus for producing the same by injection molding Toshihiro Kanematsu, Akira Fukushima, Kiyotaka Sawada, Motoyasu Murai 2004-09-21
6702565 Method and mold assembly for producing a molded object Toshihiro Kanematsu 2004-03-09
6620486 Plasting molding and method and apparatus for producing the same by injection molding Toshihiro Kanematsu, Akira Fukushima, Kiyotaka Sawada, Motoyasu Murai 2003-09-16
6565346 Plastic molded article or product and method and apparatus for producing the same by injection molding Toshihiro Kanematsu, Akira Fukushima, Kiyotaka Sawada, Motoyasu Murai 2003-05-20
6465610 Method and apparatus for manufacturing plastic optical element and plastic optical element Hidenobu Kishi, Jun Watanabe, Kiyotaka Sawada, Toshiharu Hatakeyama 2002-10-15
6287504 Plastic molding and method and apparatus for producing the same by injection molding Toshihiro Kanematsu, Akira Fukushima, Kiyotaka Sawada, Motoyasu Murai 2001-09-11