Patents by Inventor Keiji Sakamoto
Keiji Sakamoto 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).
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Publication number: 20160056115Abstract: A technique is provided which can prevent the quality of an electrical signal from degrading in an optical semiconductor device. In a cross-section perpendicular to an extending direction of an electrical signal transmission line, the electrical signal transmission line is surrounded by a shielding portion including a first noise cut wiring, second plugs, a first layer wiring, first plugs, a shielding semiconductor layer, first plugs, a first layer wiring, second plugs, and a second noise cut wiring, and the shielding portion is fixed to a reference potential. Thereby, the shielding portion blocks noise due to effects of a magnetic field or an electric field from the semiconductor substrate, which affects the electrical signal transmission line.Type: ApplicationFiled: August 17, 2015Publication date: February 25, 2016Inventors: Hiroyuki Kunishima, Yasutaka Nakashiba, Masaru Wakabayashi, Shinichi Watanuki, Ken Ozawa, Tatsuya Usami, Yoshiaki Yamamoto, Keiji Sakamoto
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Patent number: 9140329Abstract: The durability of a belt is enhanced by improving the strength of rubber itself while enhancing its peeling strength with respect to a cord, a fabric or a short fiber. A toothed belt (10) comprises a belt body (13) that is integrally formed by a tooth rubber (11) provided on one surface side thereof, a backing rubber (12) provided on the other surface side, and an embedded cord (14) spirally wound in a boundary portion between the tooth rubber (11) and the backing rubber (12) that extends in the longitudinal direction of the belt. A facing fabric (20) covering the tooth rubber (11) is adhered to a surface of the tooth rubber (11), or one surface of the belt body (13). The tooth rubber (11) is obtained by vulcanization-molding a rubber composition including rubber such as HNBR, resorcinol, a melamine compound, silica and the like.Type: GrantFiled: February 1, 2012Date of Patent: September 22, 2015Assignee: GATES CORPORATIONInventors: Mitsuhiro Yamada, Keiji Sakamoto, Shinji Uchigashima
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Publication number: 20140287862Abstract: The durability of a belt is enhanced by improving the strength of rubber itself while enhancing its peeling strength with respect to a cord, a fabric or a short fiber. A toothed belt (10) comprises a belt body (13) that is integrally formed by a tooth rubber (11) provided on one surface side thereof, a backing rubber (12) provided on the other surface side, and an embedded cord (14) spirally wound in a boundary portion between the tooth rubber (11) and the backing rubber (12) that extends in the longitudinal direction of the belt. A facing fabric (20) covering the tooth rubber (11) is adhered to a surface of the tooth rubber (11), or one surface of the belt body (13). The tooth rubber (11) is obtained by vulcanization-molding a rubber composition including rubber such as HNBR, resorcinol, a melamine compound, silica and the like.Type: ApplicationFiled: February 1, 2012Publication date: September 25, 2014Applicant: The Gates CorporationInventors: Mitsuhiro Yamada, Keiji Sakamoto, Shinji Uchigashima
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Patent number: 8810920Abstract: A lens barrel (3) comprises a drive frame (30) and a first lens frame (50). The first lens frame (50) has first to third cam followers (54a to 54c) that are respectively inserted into first to third outer cam grooves (34a to 34c), and first and second auxiliary pins (55a and 55b) disposed so as to be able to come into contact with first and second auxiliary grooves (35a and 35b). When viewed in the Y axis direction, the first and second auxiliary pins (55a and 55b) are disposed between the first to third cam followers (54a to 54c) in the peripheral direction. The positions of the first and second auxiliary pins (55a and 55b) are offset from the positions of the first to third cam followers (54a to 54c) in the Y axis direction.Type: GrantFiled: August 10, 2011Date of Patent: August 19, 2014Assignee: Panasonic CorporationInventors: Shinichi Iwasaki, Keiji Sakamoto, Eiji Nagasaki, Kenji Sasaki, Fumio Shinano
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Publication number: 20140080647Abstract: Provided is a toothed belt that has satisfactory durability even under high-temperature and high-load conditions or within an oil or water environment. The toothed belt 10 comprises a belt body 13 including a tooth rubber portion 11 and a backing rubber portion 12. A surface of the tooth rubber portion 11 is covered with a facing fabric 20. The facing fabric 20 is subjected to RFL treatment, and has an outer surface 21 covered with a hardened material of a first epoxy resin. The softening point of the hardened material of the first epoxy resin is, for example, 110° C. or higher. The epoxy equivalent of the first epoxy resin is, for example, 100 to 1500 g/eq. Alternatively, the facing fabric 20 is subjected to impregnation treatment with a treatment agent including a second epoxy resin, a hardener for hardening the second epoxy resin, and a rubber component.Type: ApplicationFiled: February 16, 2012Publication date: March 20, 2014Applicant: THE GATES CORPORATIONInventors: Keiji Sakamoto, Shinji Uchigashima, Masanao Sakamoto
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Patent number: 8601272Abstract: A signature log storing apparatus includes a signature log list and a certificate list, and registers, in the signature log list, a part of signature information in generated hysteresis signature as a signature record and a part of a user certificate in the certificate list. The signature log storing apparatus further includes a trust point list and validates a signature records registered in the signature log list and registers identification information for identifying a latest signature record out of the validate signature record, evidence information for validating validity of the user certificate for a validated signature record, and a hash value of information derived by connecting the evidence information and the hash value as needed or before the user certificate expires.Type: GrantFiled: March 31, 2006Date of Patent: December 3, 2013Assignee: Hitachi, Ltd.Inventors: Shinji Itoh, Yoshinori Honda, Hiroyasu Nunokami, Keiji Sakamoto
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Patent number: 8587716Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: October 11, 2011Date of Patent: November 19, 2013Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Yuji Adachi, Keiji Sakamoto
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Publication number: 20130277749Abstract: A first transistor required for decreasing leak current and a second transistor required for compatibility of high speed operation and low power consumption can be formed over an identical substrate and sufficient performance can be provided to the two types of the transistors respectively. Decrease in the leak current is required for the first transistor. Less power consumption and high speed operation are required for the second transistor. The upper surface of a portion of a substrate in which the second diffusion layer is formed is lower than the upper surface of a portion of the substrate where the first diffusion layer is formed.Type: ApplicationFiled: April 8, 2013Publication date: October 24, 2013Applicant: Renesas Electronics CorporationInventors: Satoshi Kura, Mitsuo Nissa, Keiji Sakamoto, Taichi Iwasaki
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Patent number: 8553132Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: August 3, 2011Date of Patent: October 8, 2013Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Keiji Sakamoto
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Patent number: 8547478Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: August 3, 2011Date of Patent: October 1, 2013Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Keiji Sakamoto
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Patent number: 8462256Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: August 3, 2011Date of Patent: June 11, 2013Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Keiji Sakamoto, Yuji Adachi
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Patent number: 8462255Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: August 3, 2011Date of Patent: June 11, 2013Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Takayuki Hayashi, Keiji Sakamoto, Kenichi Hayashi, Daisuke Ito
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Patent number: 8441572Abstract: To produce a subject's image on an imager as accurately as possible, a technique that is effectively applicable to the process of assembling an optical system is provided. An imaging device includes: an imager; a plate member, to which the imager is attached; and a holding member configured to hold the plate member. The plate member has a first portion, through which at least one fixing hole has been cut, and a second portion, to which the imager is attached and through which at least one adjusting hole has been cut. The plate member is held by the holding member using a number of fastening members to be introduced through the at least one fixing hole and the at least one adjusting hole. When the first portion is fixed on the holding member, the fastening member that is introduced through the at least one adjusting hole adjusts the relative position of the second portion to the holding member.Type: GrantFiled: July 9, 2009Date of Patent: May 14, 2013Assignee: Panasonic CorporationInventors: Akio Konishi, Koichiro Hirabayashi, Keiji Sakamoto, Daisuke Ito, Eiji Nagasaki
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Publication number: 20130016434Abstract: A lens barrel (3) comprises a drive frame (30) and a first lens frame (50). The first lens frame (50) has first to third cam followers (54a to 54c) that are respectively inserted into first to third outer cam grooves (34a to 34c), and first and second auxiliary pins (55a and 55b) disposed so as to be able to come into contact with first and second auxiliary grooves (35a and 35b). When viewed in the Y axis direction, the first and second auxiliary pins (55a and 55b) are disposed between the first to third cam followers (54a to 54c) in the peripheral direction. The positions of the first and second auxiliary pins (55a and 55b) are offset from the positions of the first to third cam followers (54a to 54c) in the Y axis direction.Type: ApplicationFiled: August 10, 2011Publication date: January 17, 2013Applicant: Panasonic CorporationInventors: Shinichi Iwasaki, Keiji Sakamoto, Eiji Nagasaki, Kenji Sasaki, Fumio Shinano
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Publication number: 20120033303Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: ApplicationFiled: October 11, 2011Publication date: February 9, 2012Applicant: PANASONIC CORPORATIONInventors: Eiichi NAGAOKA, Takayuki HAYASHI, Keiji SAKAMOTO, Kenichi HAYASHI, Daisuke ITO, Yuji ADACHI
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Patent number: 8089093Abstract: A nitride semiconductor device having a substrate electrode establishing an excellent ohmic contact with a nitride semiconductor substrate is provided. The nitride semiconductor device includes a substrate having an electrode formed on at least one main surface. The substrate is a nitride semiconductor substrate whose surface includes two regions. The first region has an electrode formed thereon and a second region does not have any electrodes formed thereon. A first n-type impurity is included in a higher concentration in the first region than that in the second region in the vicinity of the surface of the substrate.Type: GrantFiled: February 22, 2005Date of Patent: January 3, 2012Assignee: Nichia CorporationInventors: Hiroaki Matsumura, Keiji Sakamoto, Tsuyoshi Hirao
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Patent number: 8068294Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: GrantFiled: December 10, 2010Date of Patent: November 29, 2011Assignee: Panasonic CorporationInventors: Eiichi Nagaoka, Takayuki Hayashi, Keiji Sakamoto, Kenichi Hayashi, Daisuke Ito
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Publication number: 20110286111Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: ApplicationFiled: August 3, 2011Publication date: November 24, 2011Applicant: PANASONIC CORPORATIONInventors: Eiichi Nagaoka, Keiji Sakamoto
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Publication number: 20110286115Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: ApplicationFiled: August 3, 2011Publication date: November 24, 2011Applicant: PANASONIC CORPORATIONInventors: Eiichi Nagaoka, Keiji Sakamoto, Yuji Adachi
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Publication number: 20110286113Abstract: A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.Type: ApplicationFiled: August 3, 2011Publication date: November 24, 2011Applicant: PANASONIC CORPORATIONInventors: Eiichi Nagaoka, Takayuki Hayashi, Keiji Sakamoto, Kenichi Hayashi, Daisuke Ito