Patents by Inventor Hajime Tanabe
Hajime Tanabe 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: 20060023554Abstract: A read command having designated a bank, can be inputted from outside. A read command having designated a bank can be inputted from outside while an operation for reading from a memory array to a data buffer is being performed at the bank. Further, a read command having designated a bank is inputted from outside, and a buffer read command having designated a bank is inputted from outside while an operation for reading from a memory array to a data buffer is being performed at the bank, whereby reading from the data buffer of the bank to the outside is enabled.Type: ApplicationFiled: June 28, 2005Publication date: February 2, 2006Inventors: Toru Matsushita, Kenji Kozakai, Hajime Tanabe, Takashi Horii
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Patent number: 6861933Abstract: A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.Type: GrantFiled: September 2, 2003Date of Patent: March 1, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naoji Yoshida, Hajime Tanabe, Shigenori Kuroda
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Patent number: 6856223Abstract: An open-type magnet device for MRI includes a pair of upper and lower magnet assemblies, and shims are provided on opposite sides of their cooling containers and/or in holes passing through central portions of the cooling containers so as to facilitate providing a highly homogeneous static magnetic field.Type: GrantFiled: September 13, 2000Date of Patent: February 15, 2005Assignees: Hitachi Medical Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Hirotaka Takeshima, Takao Honmei, Hiroshi Tazaki, Kazuki Moritsu, Shigenori Kuroda, Hajime Tanabe
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Patent number: 6847279Abstract: A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.Type: GrantFiled: September 2, 2003Date of Patent: January 25, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naoji Yoshida, Hajime Tanabe, Shigenori Kuroda
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Patent number: 6781492Abstract: A superconducting magnet apparatus. By forming one or more holes in each of platelike ferromagnetic substances forming a magnetic shield for focusing the magnetic flux generated by superconducting coils, the flow of lines of magnetic flux is adjusted. Thereby, a static magnetic field in a measurement space is corrected. By disposing coupling tubes for supporting two cooling vessels housing superconducting coils on the rear side with respect to a central axis (Z axis) of the measurement space of the vertical direction, access to the subject is facilitated. In addition, the magnetic shield has an opening portion wider than the superconducting magnet on its side face. After the magnetic shield has been assembled, the superconducting magnet can be inserted from the opening portion.Type: GrantFiled: July 10, 2002Date of Patent: August 24, 2004Assignees: Hitachi Medical Corporation, Mitsubishi Denki KKInventors: Hirotaka Takeshima, Takao Hommei, Hajime Kawano, Hiroshi Tazaki, Takeshi Yatsuo, Shigenori Kuroda, Hajime Tanabe
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Publication number: 20040051613Abstract: A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.Type: ApplicationFiled: September 2, 2003Publication date: March 18, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Naoji Yoshida, Hajime Tanabe, Shigenori Kuroda
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Patent number: 6707359Abstract: A superconductive magnet device comprises a pair of oppositely disposed superconductive bodies in which annular superconductive coils are accommodated, and fine chip-shaped ferromagnetic shims disposed on a surface of the pair of superconductive magnet bodies so as to improve uniformity of magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies, wherein ring-shaped ferromagnetic shims are disposed concentrically with the center of annular superconductive coils on the surface of the superconductive magnet bodies.Type: GrantFiled: April 12, 2002Date of Patent: March 16, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naoji Yoshida, Hajime Tanabe, Shigenori Kuroda
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Publication number: 20030011456Abstract: Uniformity of magnet field can be easily adjusted. A superconductive magnet device comprises a pair of oppositely disposed superconductive magnet bodies 27, 31 in which annular superconductive coils 26, 30 are accommodated, and fine chip-shaped ferromagnetic shims 51, 52 disposed on a surface of the pair of superconductive magnet bodies 27, 31, so as to improve uniformity of magnetic field in a uniform magnetic field space generated in the proximity of the center between the superconductive magnet bodies 27, 31 by the fine chip-shaped ferromagnetic shims 51, 52, wherein ring-shaped ferromagnetic shims 45˜50 are disposed concentrically with the center of the annular superconductive coils 26, 30 on the surface of the superconductive magnet bodies 27, 31.Type: ApplicationFiled: April 12, 2002Publication date: January 16, 2003Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Naoji Yoshida, Hajime Tanabe, Shigenori Kuroda
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Publication number: 20020180571Abstract: A superconducting magnet apparatus. By forming one or more holes in each of platelike ferromagnetic substances forming a magnetic shield for focusing the magnetic flux generated by superconducting coils, the flow of lines of magnetic flux is adjusted. Thereby, a static magnetic field in a measurement space is corrected. By disposing coupling tubes for supporting two cooling vessels housing superconducting coils on the rear side with respect to a central axis (Z axis) of the measurement space of the vertical direction, access to the subject is facilitated. In addition, the magnetic shield has an opening portion wider than the superconducting magnet on its side face. After the magnetic shield has been assembled, the superconducting magnet can be inserted from the opening portion.Type: ApplicationFiled: July 10, 2002Publication date: December 5, 2002Inventors: Hirotaka Takeshima, Takao Hommei, Hajime Kawano, Hiroshi Tazaki, Takeshi Yatsuo, Shigenori Kuroda, Hajime Tanabe
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Patent number: 6437672Abstract: A superconducting magnet apparatus. By forming one or more holes in each of platelike ferromagnetic substances forming a magnetic shield for focusing the magnetic flux generated by superconducting coils, the flow of lines of magnetic flux is adjusted. Thereby, a static magnetic field in a measurement space is corrected. By disposing coupling tubes for supporting two cooling vessels housing superconducting coils on the rear side with respect to a central axis (Z axis) of the measurement space of the vertical direction, access to the subject is facilitated. In addition, the magnetic shield has an opening portion wider than the superconducting magnet on its side face. After the magnetic shield has been assembled, the superconducting magnet can be inserted from the opening portion.Type: GrantFiled: June 29, 1998Date of Patent: August 20, 2002Assignees: Hitachi Medical Corporation, Mitsubishi Denki Kabushiki KaishaInventors: Hirotaka Takeshima, Takao Hommei, Hajime Kawano, Hiroshi Tazaki, Takeshi Yatsuo, Shigenori Kuroda, Hajime Tanabe
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Patent number: 5939962Abstract: Annular portions are arranged on mutually confronting surfaces at circumferential edge portions of low-temperature containers, the annular portions forming annular containing portions whose cross section is rectangular. Not only a side coil among a group of coils forming a collective coil body is disposed inside the containing portion, but also a gradient magnetic field unit, a radio-frequency transmission coil, and a reception coil are disposed inside a recessed portion so as to be integrated with one another into a single body, the recessed portion being formed so as to be surrounded by the corresponding annular portion. The side coil supplies more than half a designed magnetomotive force. Since a distance J of the mutually confronting low-temperature containers, i.e.Type: GrantFiled: August 4, 1997Date of Patent: August 17, 1999Assignees: Mitsubishi Denki Kabushiki Kaisha, Hitachi Medical CorporationInventors: Yasuyuki Tahara, Hajime Tanabe, Hirotaka Takeshima