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Akira Taniguchi, Kenji Kasama, Jun Hasegawa, Tetsuo Nonami, Hirokazu Nishimura, Katsumi Hirakawa: Method of locating a coil which consists of determining the space occupied by a source coil generating a magnetic field. Olympus Optical, Armstrong Westerman Hattori McLeland & Naughton, December 7, 1999: US05997473 (73 worldwide citation)

Insertion of a probe comprising an array of 16 source coils through a forceps channel of an electronic endoscope prepares the source coils in the insert of electronic endoscope for use in monitoring work objects. To a bed where a patient lies, are mounted two sets of sensor coils crossing at a right ...


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Mitsuyuki Matsuura, Katsumi Hirakawa: Process for polymerizing ethylene. Mitsubishi Petrochemical Company, Oblon Fisher Spivak McClelland & Maier, August 9, 1988: US04762898 (19 worldwide citation)

A process for polymerizing or copolymerizing ethylene comprises contacting ethylene or ethylene and at least one of .alpha.-olefins with a catalyst consisting essentially of a combination of (A) a solid catalyst component containing at least titanium, magnesium and chlorine, (B) an organoaluminum co ...


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Tadashi Takahashi, Kazuhiro Yamamoto, Katsumi Hirakawa: Powder catalyst composition and process for polymerizing olefins with the use thereof. Mitsubishi Petrochemical Company, Oblon Spivak McClelland Maier & Neustadt, December 12, 1995: US05474962 (12 worldwide citation)

The present invention provides a powder catalyst composition for producing by gas-phase polymerization olefin polymers having excellent polymer qualities and good particle properties in a high yield.


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Hironao Kawano, Hironobu Takizawa, Hidetake Segawa, Isao Aoki, Katsumi Hirakawa, Satomi Kobayashi, Hideo Ito: Body-insertable device positioning system and in-vivo observation method. Olympus Medical Systems, Scully Scott Murphy & Presser P C, April 24, 2012: US08162821 (7 worldwide citation)

An object of the present invention is to actively control at least one of the position and direction of the imaging field in a subject and to observe a desired observed region in the subject certainly in a short period of time. A body-insertable device system according to the present invention inclu ...


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Katsumi Hirakawa, Satomi Kobayashi: Image display apparatus. Olympus Medical Systems, Scully Scott Murphy & Presser PC, June 5, 2012: US08194096 (5 worldwide citation)

An image display apparatus includes a display unit that displays images contained in a plurality of image groups inside a subject picked up by a plurality of imaging devices, and a control unit that extracts a related image related to a currently displayed image currently displayed in the display un ...


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Katsuya Suzuki, Katsuyoshi Sasagawa, Takemitsu Honda, Katsumi Hirakawa, Seiichiro Kimoto, Ayako Nagase, Kazutaka Nakatsuchi: Intra-subject position display system. Olympus Corporation, Scully Scott Murphy & Presser P C, October 13, 2009: US07603160 (4 worldwide citation)

An intra-subject position display system for displaying a position of an intra-subject device, which is introduced into a subject and moves therein, wherein a relative position of the intra-subject device to an outer surface of the subject is detected and displayed. The position of the intra-subject ...


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Katsumi Hirakawa: Image display apparatus. Olympus Corporation, Scully Scott Murphy & Presser P C, June 18, 2013: US08467615 (2 worldwide citation)

An image display apparatus that can shorten time for observing a series of images of an interior of a subject without hampering observation of a desired region of interest is provided. The image display apparatus according to the present invention is an image display apparatus for displaying the ser ...