Patents by Inventor Mitsumasa Okada
Mitsumasa Okada 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: 6873498Abstract: A magnetic head has a narrow upper magnetic pole and is capable of restricting side erasure and record bleeding. The magnetic head is capable of writing data on a recording medium, and includes an upper magnetic pole including a pole section which faces the recording medium and has a prescribed width, and a lower magnetic pole including grooves respectively formed on the both sides of the pole section. A level of edges of the grooves are lower than that of an upper face of the lower magnetic pole.Type: GrantFiled: March 20, 2002Date of Patent: March 29, 2005Assignee: Fujitsu LimitedInventors: Takashi Ito, Mitsumasa Okada, Masashi Yanagawa
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Publication number: 20050027310Abstract: An ultrasonic treatment apparatus comprises an endoscope having an insertion portion to be inserted in a body cavity, and a treatment unit having an ultrasonic vibrator which generates ultrasonic vibrations, and a treatment portion which performs treatment by utilizing the ultrasonic vibrations generated by the ultrasonic vibrator. The ultrasonic treatment apparatus further comprises a treatment unit holding portion, which is provided in a distal end portion of the insertion portion and to which the treatment unit is attached, a cable which transmits an electric signal to the ultrasonic vibrator, and at least one bundle member which bundles the insertion portion and the cable.Type: ApplicationFiled: May 10, 2004Publication date: February 3, 2005Inventors: Norihiro Yamada, Haruhiko Ueno, Hiroyuki Takahashi, Hiroyoshi Watanabe, Keita Suzuki, Mitsumasa Okada, Takeaki Nakamura
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Publication number: 20050021065Abstract: An ultrasonic treatment apparatus comprises an ultrasonic transmitting member which has a treatment portion for treating a target portion and which transmits ultrasonic vibrations to the treatment portion, a transducer which is connected to the ultrasonic transmitting member and includes a first element for vibrating the ultrasonic transmitting member in an axial direction thereof and a second element for vibrating the ultrasonic transmitting member in a torsional direction thereof, a rotation driving portion which freely rotates the transducer, a first driving portion which drives the first element in the transducer, a second driving portion which drives the second element in the transducer, and a control portion which independently controls the first driving portion, the second driving portion, and the rotation driving portion.Type: ApplicationFiled: July 21, 2004Publication date: January 27, 2005Applicant: OLYMPUS CORPORATIONInventors: Norihiro Yamada, Yoshitaka Honda, Hitoshi Karasawa, Ken Fujinuma, Mitsumasa Okada, Takeaki Nakamura
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Publication number: 20050004589Abstract: An ultrasound treatment system in accordance with the present invention comprises an ultrasonic transducer, a handpiece, a probe, a sheath, a clamping member, an operation unit, an operating member, a suction base, and a perfusion base. The ultrasonic transducer generates ultrasonic vibrations. The handpiece has the ultrasonic transducer incorporated therein and serves as an operation unit. The probe is connected to the ultrasonic transducer, and serves as a vibration transmitting member for transmitting ultrasonic vibrations to a distal member realizing a stationary portion that is a treatment portion for treating a living tissue. The sheath serves as a protecting member for shielding the probe. The clamping member is opposed to the distal member at the distal end of the sheath, and realizes a movable portion that is another treatment portion for clamping a living tissue in cooperation with the distal member.Type: ApplicationFiled: August 29, 2003Publication date: January 6, 2005Applicant: OLYMPUS OPTICAL CO., LD.Inventors: Mitsumasa Okada, Toshiya Sugai, Yoshitaka Honda, Manabu Ishikawa, Tomohisa Sakurai
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Patent number: 6778356Abstract: In the thin film magnetic head of the present invention, angle of an end face of a heaped layer with respect to a lower magnetic pole layer is made obtuse so as to prevent flux leakage at a rear part of the heaped layer and improve writing characteristics of the magnetic head. The thin film magnetic head comprises: a lower magnetic pole layer; a gap layer provided on the lower magnetic pole layer; a sub-magnetic pole layer provided on the gap layer; an upper magnetic pole layer connected to a rear part of the sub-magnetic pole layer; and a heaped layer made of an electrically insulating material and provided on the rear side of the gap layer and between the lower magnetic pole layer and the sub-magnetic pole layer, the heaped layer having a slope portion, which is extended toward the gap layer and whose height is gradually reduced toward the same.Type: GrantFiled: January 16, 2002Date of Patent: August 17, 2004Assignee: Fujitsu LimitedInventors: Kenichi Kawai, Mitsumasa Okada
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Patent number: 6761698Abstract: An ultrasonic operation system includes: a transmission cable that is connected detachably, through a connector, to a connector receptacle in a main apparatus unit; plural types of transducers provided with a connector receptacle each capable of detachably connecting the connector of the transmission cable, an identification element for outputting its own identification signal, and a ultrasonic vibrator, correspondingly; and a main apparatus unit for receiving the identification signals in an identification circuit, automatically controlling drive signals that a control circuit causes a drive signal generator unit to generate, and automatically displaying the identified instrument on a control-display unit.Type: GrantFiled: July 27, 2001Date of Patent: July 13, 2004Assignee: Olympus CorporationInventors: Norikiyo Shibata, Mitsumasa Okada, Manabu Ishikawa, Tomohisa Sakurai, Hitoshi Karasawa
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Patent number: 6669690Abstract: An ultrasound treatment system in accordance with the present invention comprises an ultrasonic transducer, a handpiece, a probe, a sheath, a clamping member, an operation unit, an operating member, a suction base, and a perfusion base. The ultrasonic transducer generates ultrasonic vibrations. The handpiece has the ultrasonic transducer incorporated therein and serves as an operation unit. The probe is connected to the ultrasonic transducer, and serves as a vibration transmitting member for transmitting ultrasonic vibrations to a distal member realizing a stationary portion that is a treatment portion for treating a living tissue. The sheath serves as a protecting member for shielding the probe. The clamping member is opposed to the distal member at the distal end of the sheath, and realizes a movable portion that is another treatment portion for clamping a living tissue in cooperation with the distal member.Type: GrantFiled: July 15, 1999Date of Patent: December 30, 2003Assignee: Olympus Optical Co., Ltd.Inventors: Mitsumasa Okada, Toshiya Sugai, Yoshitaka Honda, Manabu Ishikawa, Tomohisa Sakurai
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Publication number: 20030225332Abstract: An ultrasonic therapeutic apparatus is disclosed which includes an endoscope having an inserting section to be inserted into an object, an ultrasonic vibrator for generating ultrasonic vibration, a vibration transmitting section for transmitting the ultrasonic vibration generated by the ultrasonic vibrator to the object, and a holding member for holding the ultrasonic vibrator and the vibration transmitting section in a tip portion of the inserting section of the endoscope. This construction does not need the process of positioning the ultrasonic therapeutic apparatus with respect to the endoscope. An example of the vibration transmitting section is a probe (horn).Type: ApplicationFiled: May 27, 2003Publication date: December 4, 2003Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Mitsumasa Okada, Satoshi Honma
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Publication number: 20030112561Abstract: The magnetic head of the present invention has a narrow upper magnetic pole and capable of restricting side erasure and record bleeding. The magnetic head for writing data on a recording medium comprises: an upper magnetic pole including a pole section, which faces the recording medium and has a prescribed width; and a lower magnetic pole including grooves, which are respectively formed on the both sides of the pole section, wherein level of edges of the grooves are lower than that of an upper face of the lower magnetic pole.Type: ApplicationFiled: March 20, 2002Publication date: June 19, 2003Applicant: FUJITSU LIMITEDInventors: Takashi Ito, Mitsumasa Okada, Masashi Yanagawa
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Patent number: 6569178Abstract: An ultrasonic coagulating/cutting apparatus is provided which includes a switching member for switching the force to hold an organism tissue between a jaw and a probe during operation for opening or closing the jaw.Type: GrantFiled: March 3, 2000Date of Patent: May 27, 2003Assignee: Olympus Optical Co., Ltd.Inventors: Makoto Miyawaki, Mitsumasa Okada
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Publication number: 20030076628Abstract: In the thin film magnetic head of the present invention, angle of an end face of a heaped layer with respect to a lower magnetic pole layer is made obtuse so as to prevent flux leakage at a rear part of the heaped layer and improve writing characteristics of the magnetic head. The thin film magnetic head comprises: a lower magnetic pole layer; a gap layer provided on the lower magnetic pole layer; a sub-magnetic pole layer provided on the gap layer; an upper magnetic pole layer connected to a rear part of the sub-magnetic pole layer; and a heaped layer made of an electrically insulating material and provided on the rear side of the gap layer and between the lower magnetic pole layer and the sub-magnetic pole layer, the heaped layer having a slope portion, which is extended toward the gap layer and whose height is gradually reduced toward the same.Type: ApplicationFiled: January 16, 2002Publication date: April 24, 2003Applicant: FUJITSU LIMITEDInventors: Kenichi Kawai, Mitsumasa Okada
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Publication number: 20030023257Abstract: A trocar is provided having a needle unit. The needle unit has a paracentetic section, which is substantially pyramidal. The paracentetic section has two curved surfaces that diagonally oppose each other. The surfaces are formed by cutting the ridges of the section, which diagonally oppose each other. The remaining two ridges of the paracentetic section make, respectively, sharp cutting edges for cutting living tissues. The cutting edges are substantially symmetrical to each other with respect to the axis of the needle unit.Type: ApplicationFiled: September 17, 2002Publication date: January 30, 2003Applicant: OLYMPUS OPTICAL CO., LTD.Inventors: Manabu Ishikawa, Mitsumasa Okada
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Patent number: 6497714Abstract: A trocar is provided having a needle unit. The needle unit has a paracentetic section, which is substantially pyramidal. The paracentetic section has two curved surfaces that diagonally oppose each other. The surfaces are formed by cutting the ridges of the section, which diagonally oppose each other. The remaining two ridges of the paracentetic section make, respectively, sharp cutting edges for cutting living tissues. The cutting edges are substantially symmetrical to each other with respect to the axis of the needle unit.Type: GrantFiled: July 9, 1999Date of Patent: December 24, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Manabu Ishikawa, Mitsumasa Okada
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Patent number: 6475649Abstract: The method of making the magnetic resistance element comprises the steps of: forming a first magnetizable layer, a non-magnetizable layer and a second magnetizable layer, in this order, on an insulating layer; providing a resist layer for forming a main part of the magnetic resistance element on the second magnetizable layer; etching side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer to form into slope faces by ion milling from the second magnetizable layer side; forming terminals on the slope faces; and removing the resist layer, wherein a part of the first magnetizable layer which is located outside of the slope faces is left on the insulating layer when the side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer are etched by ion milling.Type: GrantFiled: January 24, 2001Date of Patent: November 5, 2002Assignee: Fujitsu LimitedInventors: Masaaki Mikami, Takashi Ito, Takamitsu Orimoto, Mitsumasa Okada
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Publication number: 20020107538Abstract: An ultrasonic operation system comprises: a transmission cable that is connected detachably, through a connector, to a connector receptacle in a main apparatus unit; plural types of transducers provided with a connector receptacle each capable of detachably connecting the connector of the transmission cable, an identification element for outputting its own identification signal, and a ultrasonic vibrator, correspondingly; and a main apparatus unit for receiving the identification signals in an identification circuit, automatically controlling drive signals that a control circuit causes a drive signal generator unit to generate, and automatically displaying the identified instrument on a control-display unit.Type: ApplicationFiled: July 27, 2001Publication date: August 8, 2002Inventors: Norikiyo Shibata, Mitsumasa Okada, Manabu Ishikawa, Tomohisa Sakurai, Hitoshi Karasawa
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Patent number: 6425907Abstract: A hand-piece comprises an arm main body which moves relative to a grip section, and an arm section having a clamp member openable and closable with respect to a probe section. As a result of movement of the arm main body relative to the grip section, the clamp member is shifted between a closure position in which the clamp member cooperates with the probe section to hold living tissue between the clamp member and the probe section, and an open position in which the clamp member is separated from the probe section to release the living tissue.Type: GrantFiled: June 23, 2000Date of Patent: July 30, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Norikiyo Shibata, Makoto Miyawaki, Mitsumasa Okada
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Patent number: 6340352Abstract: An ultrasound treatment system in accordance with the present invention includes: ultrasonic transducers for generating ultrasonic vibrations; a handpiece including the ultrasonic transducers and serving as an operation unit; a probe connected to the ultrasonic transducers and serving as a vibration conveyer for conveying ultrasonic transducers to a distal member constituting a stationary section of a treatment unit used to treat a living tissue; a sheath serving as a protective member for shielding the probe; a holding member opposed to the distal member at the distal end of the sheath and constituting a movable section of the treatment unit which clamps a living tissue in cooperation with the distal member; a manipulator to be handled for clamping or freeing a living tissue using the holding member and distal member; an operation member for driving the holding member responsively to a movement of the manipulator; and a turning mechanism for turning the treatment unit relative to the manipulator with the axiType: GrantFiled: October 25, 1999Date of Patent: January 22, 2002Assignee: Olympus Optical Co., Ltd.Inventors: Mitsumasa Okada, Toshiya Sugai, Yoshitaka Honda, Manabu Ishikawa, Tomohisa Sakurai
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Publication number: 20010009062Abstract: The method of making the magnetic resistance element comprises the steps of: forming a first magnetizable layer, a non-magnetizable layer and a second magnetizable layer, in this order, on an insulating layer; providing a resist layer for forming a main part of the magnetic resistance element on the second magnetizable layer; etching side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer to form into slope faces by ion milling from the second magnetizable layer side; forming terminals on the slope faces; and removing the resist layer, wherein a part of the first megnetizable layer which is located outside of the slope faces is left on the insulating layer when the side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer are etched by ion milling.Type: ApplicationFiled: January 24, 2001Publication date: July 26, 2001Applicant: Fujitsu LimitedInventors: Masaaki Mikami, Takashi Ito, Takamitsu Orimoto, Mitsumasa Okada
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Patent number: 6258283Abstract: The method of making the magnetic resistance element comprises the steps of: forming a first magnetizable layer, a non-magnetizable layer and a second magnetizable layer, in this order, on an insulating layer; providing a resist layer for forming a main part of the magnetic resistance element on the second magnetizable layer; etching side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer to form into slope faces by ion milling from the second magnetizable layer side; forming terminals on the slope faces; and removing the resist layer, wherein a part of the first magnetizable layer which is located outside of the slope faces is left on the insulating layer when the side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer are etched by ion milling.Type: GrantFiled: November 17, 1998Date of Patent: July 10, 2001Assignee: Fuuitsu LimitedInventors: Masaaki Mikami, Takashi Ito, Takamitsu Orimoto, Mitsumasa Okada
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Patent number: 6193709Abstract: An ultrasonic treatment apparatus according to the present invention comprises an ultrasonic transducer for generating ultrasonic vibration, a vibration transmitting member for transmitting the ultrasonic vibration generated by the ultrasonic transducer, the vibration transmitting member having a proximal end connected to the ultrasonic transducer and a distal end portion used to treat a living organism by means of the transmitted ultrasonic vibration, a grasping member opposed to the distal end portion of the vibration transmitting member and having a grasping surface capable of grasping the living organism in cooperation with the distal end portion, an operating mechanism for moving the grasping member between a closed position in which the grasping member engages the distal end portion of the vibration transmitting member and an open position in which the grasping member is separated from distal end portion, and a follow-up mechanism for driving or allowing the grasping member in the closed position to folType: GrantFiled: May 12, 1999Date of Patent: February 27, 2001Assignee: Olympus Optical Co., Ltd.Inventors: Makoto Miyawaki, Toshihiko Hashiguchi, Mitsumasa Okada, Norikiyo Shibata