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Hitoshi Sato, Koichi Sato, Hiroyasu Numaya, Hiroyuki Matsuda, Masaru Iwahashi, Keiji Tsurumaki, Koichi Jinushi: Stepping motor type indicator having a pole tooth with reduced end area. Nippon Seiki, McDermott Will & Emery, April 3, 2001: US06211585 (26 worldwide citation)

A stepping motor type indicator provided with unambiguous stable points having a holding force in a non-excited condition sufficient to suppress undesirable movements of a pointer. The stepping motor type indicator includes a stepping motor (


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Masaru Iwahashi, Atsushi Kondo: Rotation detector for a wheeled vehicle. Nippon Seiki, McDermott Will & Emery, August 28, 2012: US08253412 (2 worldwide citation)

A rotation detector that can be assembled into a hub of a wheel without breakage of an object to be detected. The rotation detector has a housing (1) having an insertion section (1a) in which an axle (S) is inserted and that is placed between a hub (10a) of a front wheel (10) and a front fork, a mag ...


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Masaru Iwahashi: Position detector device capable of reducing the effect of external magnetic fields on precision in detection. Nippon Seiki, McDermott Will & Emery, November 25, 2014: US08896299 (1 worldwide citation)

Provided is a position detector device capable of suppressing the effect of external magnetic fields on precision in detection. A position detector device (1) comprises: a subject to be detected (4a), which rotates along with the rotation of a handle grip (3) that is disposed on a handlebar (2); a d ...


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Masaru Iwahashi: Rotation angle detecting device. Nippon Seiki, McDermott Will & Emery, April 7, 2015: US09000758

Disclosed is a rotation angle detecting device wherein a filling member applied in a second housing section which houses an electromagnetic conversion element is prevented from entering a first housing section which houses a magnet. The rotation angle detecting device (1) is provided with: a rotatin ...


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Masaru Iwahashi: Position detecting device for detecting the operation position of an operating portion of a vehicle. Nippon Seiki, McDermott Will & Emery, December 30, 2014: US08922201

A position detecting device affixed to a handle bar, wherein the positional displacement between a section to be detected and a detecting section is minimized to reduce the degradation of the detection accuracy. A position detecting device 1 comprising: a section 4 to be detected which is rotated on ...


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Masaru Iwahashi, Atsushi Kondo: Rotation Detector. Mcdermott Will & Emery, June 11, 2009: US20090146648-A1

A rotation detector that can be assembled into a hub of a wheel without breakage of an object to be detected. The rotation detector has a housing (1) having an insertion section (1a) in which an axle (S) is inserted and that is placed between a hub (10a) of a front wheel (10) and a front fork, a mag ...


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Masaru Iwahashi: Position detecting device. Nippon Seiki, November 8, 2012: US20120280676-A1

A position detecting device affixed to a handle bar, wherein the positional displacement between a section to be detected and a detecting section is minimized to reduce the degradation of the detection accuracy. A position detecting device 1 comprising: a section 4 to be detected which is rotated on ...


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Masaru Iwahashi: Rotation angle detecting device. Nippon Seiki, July 5, 2012: US20120169325-A1

Disclosed is a rotation angle detecting device wherein a filling member applied in a second housing section which houses an electromagnetic conversion element is prevented from entering a first housing section which houses a magnet. The rotation angle detecting device (1) is provided with: a rotatin ...