Patents by Inventor Hirohisa Sano
Hirohisa Sano 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: 20230366054Abstract: The present invention provides a heat treatment method and a heat treatment apparatus for an amorphous alloy ribbon, said method and apparatus being capable of uniformly heat treating an amorphous alloy ribbon, while suppressing the occurrence of anisotropy in the magnetic characteristics. A heat treatment method for an amorphous alloy ribbon, said method comprising a step wherein an amorphous alloy ribbon is transferred, while being in contact with a heated projected surface, and the amorphous alloy ribbon is transferred, while having the part that is in contact with the projected surface pressed against the projected surface from a surface which is on the reverse side of the surface that is in contact with the projected surface.Type: ApplicationFiled: September 22, 2021Publication date: November 16, 2023Applicant: Proterial, Ltd.Inventors: Hirohisa SANO, Takeshi FUKUYAMA
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Publication number: 20220344980Abstract: The stator for a rotating electrical machine includes an annular first iron core part, which is a stacked body including electrical steel plates, and second iron core part, which is a stacked body including an amorphous soft magnetic metal or a nanocrystalline soft magnetic metal, wherein: the annular first iron core part includes a plurality of tooth parts which protrude toward the inner circumferential side and around which a coil is wound, and first groove parts formed within each tooth part from an outer circumferential surface; and the second iron core parts are disposed in the first groove parts.Type: ApplicationFiled: September 23, 2020Publication date: October 27, 2022Applicant: HITACHI METALS, LTD.Inventors: Mamoru KIMURA, Hirohisa SANO, Kyohei AIMUTA, Toshio ABE, Motoki OHTA
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Patent number: 7292519Abstract: An integrated optical head records and reproduces information to and from optical discs of different types, including CD and DVD, with use of a single information recording/reproducing apparatus. The optical head has a plurality of semiconductor lasers of different wavelengths integrated by index alignment onto a substrate formed with an optoelectric integrated circuit, photodetection patterns, and a reflecting mirror.Type: GrantFiled: January 4, 2005Date of Patent: November 6, 2007Assignee: Hitachi, Ltd.Inventors: Kimio Tatsuno, Masahide Tokuda, Hirohisa Sano, Toshiaki Tanaka, Takeshi Shimano, Shigeru Nakamura, Takeshi Maeda, Akira Arimoto
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Patent number: 7289702Abstract: The present invention provides an optical module using optical waveguides which permits easy fabrication of a PLC type optical multiplexer/demultiplexer with reduced loss. The optical module comprises cores which are contiguous to each other through a dicing groove adapted to position and fix an optical functional part such as a wavelength selection filter and a core branched from the said cores. A slight gap is present between the former and the latter core and both cores are narrower in width in the vicinity of the dicing groove than the other portions.Type: GrantFiled: February 13, 2003Date of Patent: October 30, 2007Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Makoto Takahashi, Tatemi Ido, Hirohisa Sano, Nobuo Miyadera
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Patent number: 7272314Abstract: An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters. The “M1” ports of the first optical signal switch connected to the one terminal, and the “M2” ports of the second optical signal switch connected to the other terminal are larger than, or equal to 2.Type: GrantFiled: August 25, 2004Date of Patent: September 18, 2007Assignee: Hitachi, Ltd.Inventors: Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani, Hirohisa Sano
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Publication number: 20060153501Abstract: The present invention provides an optical module using optical waveguides which permits easy fabrication of a PLC type optical multiplexer/demultiplexer with reduced loss. The optical module comprises cores which are contiguous to each other through a dicing groove adapted to position and fix an optical functional part such as a wavelength selection filter and a core branched from the said cores. A slight gap is present between the former and the latter core and both cores are narrower in width in the vicinity of the dicing groove than the other portions.Type: ApplicationFiled: February 13, 2003Publication date: July 13, 2006Inventors: Makoto Takahashi, Tatemi Ido, Hirohisa Sano, Nobuo Miyadera
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Publication number: 20060077016Abstract: A lumped element non-reciprocal circuit device is downsized without an increase in an insertion loss. A lumped element non-reciprocal circuit device comprises a plurality of center electrodes; a microwave magnetic material; a permanent magnet; and a metal case that serves as a magnetic yoke, wherein the center electrode is disposed on a main surface of the microwave magnetic material, the microwave magnetic material has a side surface perpendicular to the main surface, and a shortest distance between the side surface of the microwave magnetic material and the metal case is set to be equal to or larger than a thickness of the microwave magnetic material and equal to or smaller than 2.3 times of the thickness of the microwave magnetic material.Type: ApplicationFiled: September 1, 2005Publication date: April 13, 2006Inventors: Yuta Sugiyama, Hideto Mikami, Hirohisa Sano
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Patent number: 6965552Abstract: A method of mounting an optical device having a step on the surface opposing to a mounting substrate favorably by face-down bonding which enables a decrease in the number of components or integrate additional components on one identical substrate and, accordingly, is useful for reducing the size and the thickness of an optical head using a light source, the method includes the step of making the volume of a solder pattern to the area ratio of each electrode different for every wiring electrode portions upon mounting the electrodes on the substrate for mounting the optical device, in which the optical device having the step can be mounted favorably to the substrate by the control for the height of solder upon melting.Type: GrantFiled: February 27, 2002Date of Patent: November 15, 2005Assignees: Hitachi, Ltd., Nichia CorporationInventors: Masahide Tokuda, Kimio Tatsuno, Hirohisa Sano, Takeshi Shimano, Shigeharu Kimura
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Publication number: 20050122880Abstract: An integrated optical head records and reproduces information to and from optical discs of different types, including CD and DVD, with use of a single information recording/reproducing apparatus. The optical head has a plurality of semiconductor lasers of different wavelengths integrated by index alignment onto a substrate formed with an optoelectric integrated circuit, photodetection patterns, and a reflecting mirror.Type: ApplicationFiled: January 4, 2005Publication date: June 9, 2005Inventors: Kimio Tatsuno, Masahide Tokuda, Hirohisa Sano, Toshiaki Tanaka, Takeshi Shimano, Shigeru Nakamura, Takeshi Maeda, Akira Arimoto
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Patent number: 6868210Abstract: An optical transmitter/receiver module of wavelength division multiplexing type which undergoes a reduced excess loss resulting from the displacement of a dicing position is fabricated with a high yield rate. An optical waveguide for guiding reflected light from a wavelength selection filter has a core substantially larger in size than the core of each of the other optical waveguides.Type: GrantFiled: July 15, 2003Date of Patent: March 15, 2005Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Makoto Takahashi, Tatemi Ido, Hirohisa Sano, Tomoaki Shibata
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Patent number: 6813445Abstract: An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters.Type: GrantFiled: January 31, 2002Date of Patent: November 2, 2004Assignees: Hitachi, Ltd., Hitachi Advanced Systems CorporationInventors: Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani, Hirohisa Sano
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Publication number: 20040175075Abstract: An optical transmitter/receiver module of wavelength division multiplexing type which undergoes a reduced excess loss resulting from the displacement of a dicing position is fabricated with a high yield rate. An optical waveguide for guiding reflected light from a wavelength selection filter has a core substantially larger in size than the core of each of the other optical waveguides.Type: ApplicationFiled: July 15, 2003Publication date: September 9, 2004Inventors: Makoto Takahashi, Tatemi Ido, Hirohisa Sano, Tomoaki Shibata
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Patent number: 6782018Abstract: This invention is provided to reduce wavefront aberrations caused by the filling of a transparent resin intended to prevent degradation of a diode laser in a hermetically sealed package. A parallel-plane plate is arranged between a diode laser and an objective lens, and a transparent resin is filled into a space formed between the diode laser and the parallel-plane plate. With this invention, degradations of the diode lasers can be prevented and the wavefront aberrations can be reduced.Type: GrantFiled: February 26, 2002Date of Patent: August 24, 2004Assignee: Hitachi, Litd.Inventors: Kimio Tatsuno, Masahide Tokuda, Shigeharu Kimura, Takeshi Shimano, Hirohisa Sano
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Publication number: 20030147333Abstract: A method of mounting an optical device having a step on the surface opposing to a mounting substrate favorably by face-down bonding which enables a decrease in the number of components or integrate additional components on one identical substrate and, accordingly, is useful for reducing the size and the thickness of an optical head using a light source, the method typically includes the step of making the area ratio of each electrode to a solder pattern different for every wiring electrode portions upon mounting the electrodes on the substrate for mounting the optical device, in which the optical device having the step can be mounted favorably to the substrate by the control for the height of solder upon melting, and the volume of the solder is previously controlled depending on the wettability of a region of the substrate covered by the solder.Type: ApplicationFiled: February 27, 2002Publication date: August 7, 2003Inventors: Masahide Tokuda, Kimio Tatsuno, Hirohisa Sano, Takeshi Shimano, Shigeharu Kimura
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Publication number: 20030128726Abstract: This invention is provided to reduce wavefront aberrations caused by the filling of a transparent resin intended to prevent degradation of a diode laser in a hermetically sealed package. A parallel-plane plate is arranged between a diode laser and an objective lens, and a transparent resin is filled into a space formed between the diode laser and the parallel-plane plate. With this invention, degradations of the diode lasers can be prevented and the wavefront aberrations can be reduced.Type: ApplicationFiled: February 26, 2002Publication date: July 10, 2003Applicant: Hitachi, Ltd.Inventors: Kimio Tatsuno, Masahide Tokuda, Shigeharu Kimura, Takeshi Shimano, Hirohisa Sano
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Patent number: 6488416Abstract: A conventional problem is to provide an optical module capable of being reflow mounted together with electronic components collectively, and, at the same time, securing a mechanical strength that can bear a large stress at the time of an attachment/detachment of the optical fiber. A solution to the above-mentioned problem can be attained by using an optical connector removable type optical module for reflow mounting having a fixing structure for fixing itself to a mount board, including a receptacle part installed to an optical module 19 to which an optical connector 1 is detachably connected; electric terminals 4 for reflow mounting that are arranged corresponding to lands 8 on a mount board 6; and stud parts 5 that are able to fit in fixing holes 7 on the mount board 6.Type: GrantFiled: September 14, 2000Date of Patent: December 3, 2002Assignee: Hitachi, Ltd.Inventors: Masato Shishikura, Koji Yoshida, Kimio Tatsuno, Hirohisa Sano
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Publication number: 20020093712Abstract: An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters.Type: ApplicationFiled: January 31, 2002Publication date: July 18, 2002Inventors: Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani, Hirohisa Sano
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Patent number: 6362905Abstract: An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters.Type: GrantFiled: June 30, 1998Date of Patent: March 26, 2002Assignee: Hitachi, Ltd.Inventors: Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani, Hirohisa Sano
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Patent number: 6317230Abstract: Input/output fibers for the optical cross-connect system are classified into working fibers and protecting fibers. In a normal time (a state in which there occurs no failure), there turns out to be a one-to-one correspondence between a line terminal and a working fiber. Namely, connection property required for the switch matrix in the optical cross-connect system is not necessarily strictly non-blocking connections among all of the fibers. The connection property is a one-to-one connection relationship with the working fibers, and is a predetermined connection relationship with the protecting fibers at the time of a failure occurrence. Utilization thereof makes it possible to extremely downsize scale of the switch.Type: GrantFiled: July 14, 1998Date of Patent: November 13, 2001Assignee: Hitachi, Ltd.Inventors: Shigeki Kitajima, Shoichi Hanatani, Hirohisa Sano, Tatsuo Kanetake
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Publication number: 20010033403Abstract: Input/output fibers for the optical cross-connect system are classified into working fibers and protecting fibers. In a normal time (a state in which there occurs no failure), there turns out to be a one-to-one correspondence between a line terminal and a working fiber. Namely, connection property required for the switch matrix in the optical cross-connect system is not necessarily strictly non-blocking connections among all of the fibers. The connection property is a one-to-one connection relationship with the working fibers, and is a predetermined connection relationship with the protecting fibers at the time of a failure occurrence. Utilization thereof makes it possible to extremely downsize scale of the switch.Type: ApplicationFiled: June 19, 2001Publication date: October 25, 2001Inventors: Shigeki Kitajima, Shoichi Hanatani, Hirohisa Sano, Tatsuo Kanetake