Patents by Inventor Toshihiro Ishii
Toshihiro Ishii 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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Patent number: 8035676Abstract: In a surface emitting laser element, on a substrate whose normal direction of a principal surface is inclined, a resonator structural body including an active layer, and a lower semiconductor DBR and an upper semiconductor DBR sandwiching the resonator structural body are stacked. A shape of a current passing through region in an oxide confinement structure of the upper semiconductor DBR is symmetrical to an axis passing through a center of the current passing through region parallel to an X axis and symmetrical to an axis passing through the center of the current passing through region parallel to a Y axis, and a length of the current passing through region is greater in the Y axis direction than in the X axis direction. A thickness of an oxidized layer surrounding the current passing through region is greater in the ?Y direction than in the +X and ?X directions.Type: GrantFiled: April 30, 2009Date of Patent: October 11, 2011Assignee: Ricoh Company, Ltd.Inventors: Kazuhiro Harasaka, Shunichi Sato, Naoto Jikutani, Toshihiro Ishii
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Publication number: 20110228035Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.Type: ApplicationFiled: March 16, 2011Publication date: September 22, 2011Applicant: RICOH COMPANY, LTD.Inventors: Toshihiro Ishii, Satoru Sugawara, Yoshihiro Ohba, Kazuhiro Harasaka, Shunichi Sato, Kazuhiko Adachi
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Publication number: 20110211869Abstract: A manufacturing method for manufacturing a surface-emitting laser device includes the steps of forming a laminated body in which a lower reflecting mirror, a resonator structure including an active layer, and an upper reflecting layer having a selective oxidized layer are laminated on a substrate; etching the laminated body to form a mesa structure having the selective oxidized layer exposed at side surfaces thereof; selectively oxidizing the selective oxidized layer from the side surfaces of the mesa structure to form a constriction structure in which a current passing region is surrounded by an oxide; forming a separating groove at a position away from the mesa structure; passivating an outermost front surface of at least a part of the laminated body exposed when the separating groove is formed; and coating a passivated part with a dielectric body.Type: ApplicationFiled: November 12, 2009Publication date: September 1, 2011Inventors: Hiroyoshi Shouji, Shunichi Sato, Toshihiro Ishii, Kengo Makita, Masahiro Hayashi, Toshihide Sasaki, Akihiro Itoh
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Patent number: 7978739Abstract: In a surface emitting laser element, on an inclined substrate, a resonator structural body including an active layer, and a lower semiconductor DBR and an upper semiconductor DBR sandwiching the resonator structural body are stacked. A shape of a current passing-through region in an oxide confinement structure of the upper semiconductor DBR is symmetrical to an axis passing through a center of the current passing-through region parallel to an X axis and symmetrical to an axis passing through the center of the current passing-through region parallel to a Y axis, and a thickness of an oxidized layer surrounding the current passing-through region is greater in the +Y direction than in the +X and ?X directions. An opening width of a light outputting section in the X axis direction is smaller than another opening width of the light outputting section in the Y axis direction.Type: GrantFiled: June 9, 2009Date of Patent: July 12, 2011Assignee: Ricoh Company, Ltd.Inventors: Satoru Sugawara, Toshihiro Ishii, Kazuhiro Harasaka, Shunichi Sato
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Patent number: 7728503Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.Type: GrantFiled: March 28, 2007Date of Patent: June 1, 2010Assignee: Ricoh Company, Ltd.Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
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Publication number: 20100073697Abstract: An electric charging apparatus and an image forming apparatus using the electric charging apparatus, capable of stably discharging electrons and reducing deterioration in an electron discharging member, which includes an electric field forming device including two electrodes facing each other to form electric field therebetween including an electron discharging member provided at a portion of one of the electrodes, where the portion faces the other electrode, to discharge electrons into the electric field, and a voltage applying controller to control voltage applied to the electrodes, wherein the voltage applying controller selects two or more intensities of the electric field.Type: ApplicationFiled: March 19, 2008Publication date: March 25, 2010Inventors: Yukimichi Someya, Eiichi Ohta, Naomi Sugimoto, Takuro Sekiya, Yasuo Katano, Shohji Tanaka, Yoshihiko Iijima, Toshihiro Ishii
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Publication number: 20090310632Abstract: In a surface emitting laser element, on an inclined substrate, a resonator structural body including an active layer, and a lower semiconductor DBR and an upper semiconductor DBR sandwiching the resonator structural body are stacked. A shape of a current passing-through region in an oxide confinement structure of the upper semiconductor DBR is symmetrical to an axis passing through a center of the current passing-through region parallel to an X axis and symmetrical to an axis passing through the center of the current passing-through region parallel to a Y axis, and a thickness of an oxidized layer surrounding the current passing-through region is greater in the +Y direction than in the +X and ?X directions. An opening width of a light outputting section in the X axis direction is smaller than another opening width of the light outputting section in the Y axis direction.Type: ApplicationFiled: June 9, 2009Publication date: December 17, 2009Applicant: RICOH COMPANY, LTD.Inventors: Satoru SUGAWARA, Toshihiro Ishii, Kazuhiro Harasaka, Shunichi Sato
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Publication number: 20090285252Abstract: A disclosed surface-emitting laser includes a substrate and multiple semiconductor layers stacked on the substrate. A normal of the principal plane of the substrate is inclined with respect to one of crystal orientations <1 0 0> toward one of crystal orientations <1 1 1>. The semiconductor layers include a resonator structure including an active layer; and a semiconductor multilayer mirror stacked on the resonator structure. The semiconductor multilayer mirror includes a confined structure where a current passage area is surrounded by an oxidized area including at least an oxide generated by oxidation of a part of a selective oxidation layer containing aluminum. A strain field caused by the oxidation is present at least in a part of the vicinity of the oxidized area. In the strain field, the amount of strain in a first axis direction is different from the amount of strain in a second axis direction.Type: ApplicationFiled: May 12, 2009Publication date: November 19, 2009Applicant: RICOH COMPANY, LTD.Inventors: TOSHIHIRO ISHII, KENGO MAKITA, NAOTO JIKUTANI, KAZUHIRO HARASAKA, SHUNICHI SATO, SATORU SUGAWARA
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Publication number: 20090285602Abstract: In a surface emitting laser element, on a substrate whose normal direction of a principal surface is inclined, a resonator structural body including an active layer, and a lower semiconductor DBR and an upper semiconductor DBR sandwiching the resonator structural body are stacked. A shape of a current passing through region in an oxide confinement structure of the upper semiconductor DBR is symmetrical to an axis passing through a center of the current passing through region parallel to an X axis and symmetrical to an axis passing through the center of the current passing through region parallel to a Y axis, and a length of the current passing through region is greater in the Y axis direction than in the X axis direction. A thickness of an oxidized layer surrounding the current passing through region is greater in the ?Y direction than in the +X and ?X directions.Type: ApplicationFiled: April 30, 2009Publication date: November 19, 2009Applicant: RICOH COMPANY, LTDInventors: Kazuhiro Harasaka, Shunichi Sato, Naoto Jikutani, Toshihiro Ishii
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Patent number: 7557113Abstract: A compound having GSK-3 inhibitory activity. A1 and A3 are a single bond, an aliphatic hydrocarbon group; A2 and A4 are a single bond, CO, COO, CONR, O, OCO, NR, NRCO, NRCOO, etc.; G1 is a single bond, an aliphatic hydrocarbon, aromatic hydrocarbon, heterocyclic; G2 is H, an aliphatic hydrocarbon, an alicyclic hydrocarbon, an aromatic hydrocarbon, heterocyclic; A5 is a single bond, NR; R2 is H, halogen, an aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; A6 is a single bond, NR, CO, NRCO, NRCONR, CONR, COO, O, etc.; R3 is H, halogen, nitro, saturated aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; and R3 may be a trimethylsilyl, formyl, acyl, carboxyl, alkoxylcarbonyl, carbamoyl, alkylcarbamoyl, or cyano group when A6 is CR?CR or C?C, wherein R is H or an lower aliphatic hydrocarbon group.Type: GrantFiled: August 26, 2004Date of Patent: July 7, 2009Assignee: Teijin Pharma LimitedInventors: Takaharu Tsutsumi, Satoshi Sugiura, Masahiro Koga, Yoshiyuki Matsumoto, Toshihiro Ishii, Akira Nakano, Gen Unoki, Yuri Sakai, Reiko Takarada, Hiroko Ogawa
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Patent number: 7528140Abstract: The invention provides pyrrolo[3,2-d]pyrimidine derivatives represented by formula (I), and their medically acceptable salts. The compounds of the invention exhibit GSK-3 inhibiting activity and are therefore expected to be useful as therapeutic or prophylactic agents for conditions in which GSK-3 is implicated, such as diabetes, diabetes complications, Alzheimer's disease, neurodegenerative diseases, manic depression, traumatic encephalopathy, alopecia, inflammatory diseases, cancer and immune deficiency.Type: GrantFiled: February 24, 2003Date of Patent: May 5, 2009Assignee: Teijin LimitedInventors: Kenichiro Kataoka, Tomomi Kosugi, Toshihiro Ishii, Takahiro Takeuchi, Takaharu Tsutsumi, Akira Nakano, Gen Unoki, Masanori Yamamoto, Yuri Sakai
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Patent number: 7374116Abstract: A circulation type media agitator mill includes a cylindrical vessel, and an agitating member arranged rotatably in the cylindrical vessel. A grinding media is contained in a grinding chamber defined between a cylindrical wall of the agitating member and a surrounding cylindrical wall of the vessel. A media-separating member is arranged coaxial with the agitating member in the inner space of the agitating member. An inlet is provided for leading material to be ground to the grinding chamber, and an outlet leads the material separated from the grinding media to the outside of the mill via the media separating member. The vessel may have a length to diameter ratio smaller than one. The cylindrical wall and hub of the agitatihg member have openings to allow the grinding chamber to communicate with the media separating chamber.Type: GrantFiled: December 8, 2005Date of Patent: May 20, 2008Assignee: Ashizawa Finetech Ltd.Inventors: Tsuyoshi Ishikawa, Masakatsu Iioka, Toshihiro Ishii, Kaori Harigai
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Publication number: 20070231010Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.Type: ApplicationFiled: March 28, 2007Publication date: October 4, 2007Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
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Publication number: 20060261201Abstract: A circulation type media agitator mill includes a cylindrical vessel, and an agitating member arranged rotatably in the cylindrical vessel. The agitating member includes a cylindrical wall and a hub closing one end of the cylindrical wall at its periphery, the other end of the cylindrical wall being open. A grinding media is contained in a grinding chamber defined between the cylindrical wall of the agitating member and a surrounding cylindrical wall of the vessel. A media-separating member is arranged coaxial with the agitating member in the inner space of the agitating member. An inlet is provided for leading material to be ground to the grinding chamber, and an outlet leads the material separated from the grinding media to the outside of the mill via the media separating member.Type: ApplicationFiled: December 8, 2005Publication date: November 23, 2006Inventors: Tsuyoshi Ishikawa, Masakatsu Iioka, Toshihiro Ishii, Kaori Harigai
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Publication number: 20060160831Abstract: A compound having GSK-3 inhibitory activity. A1 and A3 are a single bond, an aliphatic hydrocarbon group; A2 and A4 are a single bond, CO, COO, CONR, O, OCO, NR, NRCO, NRCOO, etc.; G1 is a single bond, an aliphatic hydrocarbon, aromatic hydrocarbon, heterocyclic; G2 is H, an aliphatic hydrocarbon, an alicyclic hydrocarbon, an aromatic hydrocarbon, heterocyclic; A5 is a single bond, NR; R2 is H, halogen, an aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; A6 is a single bond, NR, CO, NRCO, NRCONR, CONR, COO, O, etc.; R3 is H, halogen, nitro, saturated aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; and R3 may be a trimethylsilyl, formyl, acyl, carboxyl, alkoxylcarbonyl, carbamoyl, alkylcarbamoyl, or cyano group when A6 is CR?CR or C?C, wherein R is H or an lower aliphatic hydrocarbon group.Type: ApplicationFiled: August 26, 2004Publication date: July 20, 2006Applicant: TEIJIN PHARMA LIMITEDInventors: Takaharu Tsutsumi, Satoshi Sugiura, Masahiro Koga, Yoshiyuki Matsumoto, Toshihiro Ishii, Akira Nakano, Gen Unoki, Yuri Sakai, Reiko Takarada, Hiroko Ogawa
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Publication number: 20050277773Abstract: The invention provides pyrrolo[3,2-d]pyrimidine derivatives represented by formula (I), and their medically acceptable salts. The compounds of the invention exhibit GSK-3 inhibiting activity and are therefore expected to be useful as therapeutic or prophylactic agents for conditions in which GSK-3 is implicated, such as diabetes, diabetes complications, Alzheimer's disease, neurodegenerative diseases, manic depression, traumatic encephalopathy, alopecia, inflammatory diseases, cancer and immune deficiency.Type: ApplicationFiled: February 24, 2003Publication date: December 15, 2005Inventors: Kenichiro Kataoka, Tomomi Kosugi, Toshihiro Ishii, Takahiro Takeuchi, Takaharu Tsutsumi, Akira Nakano, Gen Unoki, Masanori Yamamoto, Yuri Sakai
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Publication number: 20050171094Abstract: A pyrrolo[3,2-d]pyrimidine derivative represented by the formula (I) or a pharamaceutically acceptable salt of the derivative. The derivative or salt is useful as a GSK-3 inhibitor.Type: ApplicationFiled: February 24, 2003Publication date: August 4, 2005Inventors: Kenichiro Kataoka, Tomomi Kosugi, Toshihiro Ishii, Takahiro Takeuchi, Takaharu Tsutsumi, Akira Nakano, Yoji Yamamoto, Noboru Yoshioka
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Publication number: 20050153992Abstract: A compound having GSK-3 inhibiting function. A1 and A3 are a single bond, an aliphatic hydrocarbon group; A2 and A4 are a single bond, CO, COO, CONR, O, OCO, NR, NRCO, NRCOO, etc.; G1 is a single bond, an aliphatic hydrocarbon, aromatic hydrocarbon, heterocyclic; G2 is a hydrogen atom, an aliphatic hydrocarbon, an alicyclic hydrocarbon, an aromatic hydrocarbon, heterocyclic; A5 is a single bond, NR; R2 is H, halogen, an aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; A6 is a single bond, NR, CO, NRCO, NRCONR, CONR, COO, O, etc.; R3 is H, halogen, nitro, saturated aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon, heterocyclic; and when A6 is CR?CR or C?C; R3 may be a trimethylsilyl, formyl, acyl, carboxyl, alkoxylcarbonyl, carbamoyl, alkylcarbamoyl or cyano group; and R is H or an aliphatic hydrocarbon group.Type: ApplicationFiled: August 26, 2004Publication date: July 14, 2005Applicant: TEIJIN PHARMA LIMITEDInventors: Takaharu Tsutsumi, Satoshi Sugiura, Masahiro Koga, Yoshiyuki Matsumoto, Toshihiro Ishii, Akira Nakano, Gen Unoki, Yuri Sakai, Reiko Takarada, Hiroko Ogawa
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Publication number: 20050120611Abstract: This invention provides for an environmentally friendly live bait-modeled artificial lure for catching fish. The artificial lure in the present invention is unique in that it contains as its chief components (1) a protein crosslinked by a protein crosslinking enzyme, and one of or both that selected from (2) a non-water-soluble polysaccharide and (3) a group consisting of monosaccharides, oligosaccharides, glutinous starch syrup, and dextrins. By making the above agents active ingredients, the agent mixture can be produced to be moderately viscous and, as a result, manufacturability can be improved and degassing can be performed easily even in the case of air bubble engulfment.Type: ApplicationFiled: March 11, 2003Publication date: June 9, 2005Inventors: Takumi Shinmura, Syuuzo Kimura, Hiroyuki Yunoki, Toshihiro Ishii
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Patent number: 4937932Abstract: A membrane panel switch is formed by cutting holes in a sheet of extruded foam-molded polypropylene having a thickness greater than 2 mm. The sheet is placed on a printed circuit board with a pair of contact elements located in each of the holes. Clicking plates with extensions projecting from them are placed in the holes in contact with one contact element and spaced from the other. A press plate with a spherical upper surface and holes in the lower surface is placed in each of the sheet holes with the clicking plate extensions projecting into the press plate's lower surface holes. An insulating layer is coupled to the to cover the sheet holes and components therein.Type: GrantFiled: October 18, 1989Date of Patent: July 3, 1990Assignee: Ishii Hyoki Co., Ltd.Inventor: Toshihiro Ishii