Patents by Inventor Katsuhiro Shirakawa
Katsuhiro Shirakawa 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: 8968214Abstract: A protector which is used to cover a distal portion of a guide wire protruding from a distal opening of a tube body includes a first half body and a second half body which are movable between an open state and a closed state. Each of the first half body and the second half body includes a guide wire sandwiching and holding portion which mutually sandwich and hold the distal portion of the guide wire cooperatively in the closed state of the protector. Each of the first half body and the second half body also includes a tube body sandwiching and holding portion which mutually sandwich and hold the tube body cooperatively in the closed state of the protector.Type: GrantFiled: March 29, 2011Date of Patent: March 3, 2015Assignee: Terumo Kabushiki KaishaInventors: Shigeki Numata, Toshihiko Asao, Katsuhiro Shirakawa, Tomokane Kurosawa, Satoru Kanuka
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Patent number: 8708932Abstract: The guide wire is a guide wire includes a distal portion and a main body portion. This guide wire is provided with a first curve portion; a second curve portion included on the distal side of aforesaid first curve portion and curved to the opposite direction with respect to aforesaid first curve portion; a third curve portion included on the distal side of aforesaid second curve portion and curved to the opposite direction with respect to aforesaid second curve portion, wherein a line contacting with both aforesaid first curve portion and aforesaid third curve portion has an obtuse angle with respect to an axis line of aforesaid main body portion.Type: GrantFiled: September 14, 2012Date of Patent: April 29, 2014Assignee: Terumo Kabushiki KaishaInventors: Noriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi
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Patent number: 8353849Abstract: The guide wire is a guide wire includes a distal portion and a main body portion. This guide wire is provided with a first curve portion; a second curve portion included on the distal side of aforesaid first curve portion and curved to the opposite direction with respect to aforesaid first curve portion; a third curve portion included on the distal side of aforesaid second curve portion and curved to the opposite direction with respect to aforesaid second curve portion, wherein a line contacting with both aforesaid first curve portion and aforesaid third curve portion has an obtuse angle with respect to an axis line of aforesaid main body portion.Type: GrantFiled: August 8, 2008Date of Patent: January 15, 2013Assignee: Terumo Kabushiki KaishaInventors: Noriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi
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Publication number: 20130012834Abstract: The guide wire is a guide wire includes a distal portion and a main body portion. This guide wire is provided with a first curve portion; a second curve portion included on the distal side of aforesaid first curve portion and curved to the opposite direction with respect to aforesaid first curve portion; a third curve portion included on the distal side of aforesaid second curve portion and curved to the opposite direction with respect to aforesaid second curve portion, wherein a line contacting with both aforesaid first curve portion and aforesaid third curve portion has an obtuse angle with respect to an axis line of aforesaid main body portion.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: TERUMO KABUSHIKI KAISHAInventors: Noriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi
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Publication number: 20110178506Abstract: A protector which is used to cover a distal portion of a guide wire protruding from a distal opening of a tube body includes a first half body and a second half body which are movable between an open state and a closed state. Each of the first half body and the second half body includes a guide wire sandwiching and holding portion which mutually sandwich and hold the distal portion of the guide wire cooperatively in the closed state of the protector. Each of the first half body and the second half body also includes a tube body sandwiching and holding portion which mutually sandwich and hold the tube body cooperatively in the closed state of the protector.Type: ApplicationFiled: March 29, 2011Publication date: July 21, 2011Applicant: Terumo Kabushiki KaishaInventors: Shigeki NUMATA, Toshihiko ASAO, Katsuhiro SHIRAKAWA, Tomokane KUROSAWA, Satoru KANUKA
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Patent number: 7708744Abstract: A device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath includes a tubular member having a bore for passage of a guidewire. The tubular member has a slit cutting across the wall over the total length of the tubular member. The proximal end of the tubular member has an aperture. The proximal end of the aperture has an open part and a connecting part adjacent thereto for the holder tube. There is a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions.Type: GrantFiled: December 21, 2007Date of Patent: May 4, 2010Assignee: Terumo Kabushiki KaishaInventors: Katsuaki Soma, Toshiaki Takagi, Hiroshi Yagi, Takayuki Mori, Katsuhiro Shirakawa, Hiraku Murayama
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Publication number: 20080306468Abstract: The guide wire is a guide wire includes a distal portion and a main body portion. This guide wire is provided with a first curve portion; a second curve portion included on the distal side of aforesaid first curve portion and curved to the opposite direction with respect to aforesaid first curve portion; a third curve portion included on the distal side of aforesaid second curve portion and curved to the opposite direction with respect to aforesaid second curve portion, wherein a line contacting with both aforesaid first curve portion and aforesaid third curve portion has an obtuse angle with respect to an axis line of aforesaid main body portion.Type: ApplicationFiled: August 8, 2008Publication date: December 11, 2008Applicant: TERUMO KABUSHIKI KAISHAInventors: Noriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi
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Publication number: 20080119762Abstract: A guide wire includes a wire body, a wire distal end section at the distal side of the wire body and integrally formed in one piece with the wire body, a flat plate-shaped section provided at a distal end section of the guide wire and at the wire distal end section, a coating layer formed on a surface of the wire body, and a coil mounted at the wire distal end section. A surface part of the flat plate-shaped section preferably has a residual stress higher than that an internal part of the flat plate-shaped section.Type: ApplicationFiled: September 21, 2007Publication date: May 22, 2008Inventors: Tadasu TATEISHI, Yuuki Yoshifusa, Katsuhiro Shirakawa, Youki Aimi
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Publication number: 20080114374Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.Type: ApplicationFiled: December 21, 2007Publication date: May 15, 2008Applicant: Terumo Kabushiki KaishaInventors: Katsuaki Soma, Toshiaki Takagi, Hiroshi Yagi, Takayauki Mori, Katsuhiro Shirakawa, Hiraku Murayama
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Patent number: 7331966Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.Type: GrantFiled: March 1, 2005Date of Patent: February 19, 2008Assignee: Terumo Kabushiki KaishaInventors: Katsuaki Soma, Toshiaki Takagi, Hiroshi Yagi, Takayuki Mori, Katsuhiro Shirakawa, Hiraku Murayama
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Patent number: 6950710Abstract: An electrode lead, which is used as an implantable electrode lead and a symptom of disconnection of which can be found and detected at an early stage before complete disconnection. Also, an implantable medical instrument which uses this electrode lead safely is provided. More specifically, in an implantable electrode lead obtained by connecting conductor wires 23 and 27 with large electrical resistances and conductor wires 20 and 26 with small electrical resistances parallel to each other, when one of the low-strength conductor wires 20 and 26 is disconnected, a change in electrical resistance of the implantable electrode lead can be detected and informed. Hence, a symptom before total disconnection of the implantable electrode lead can be detected.Type: GrantFiled: March 6, 2001Date of Patent: September 27, 2005Assignee: Terumo Kabushiki KaishaInventors: Katsuhiro Shirakawa, Yoshizo Ishizuka, Fuminori Tsuboi
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Publication number: 20050197663Abstract: Disclosed herein is a device (such as guidewire inserter) for easily and certainly inserting a medical long item having a curved tip into a tube such as catheter and sheath. The guidewire inserter is a tubular member having therein a bore for passage of a guidewire. The tubular member has a slit cutting across the wall thereof over the total length thereof. The tubular member has at the proximal end thereof an aperture, which results from the slit expanding toward the proximal end. The tubular member has at the proximal end of the aperture an open part and a connecting part adjacent thereto for the holder tube. There are a pair of wing-like protruded pieces projecting in the mutually opposite directions at both sides of the open part. The distal end of the tubular member has on its outer surface a pair of protruded rims, which project in the mutually opposite directions with respect to the central axis of the tubular member.Type: ApplicationFiled: March 1, 2005Publication date: September 8, 2005Applicant: Terumo Kabushiki KaishaInventors: Katsuaki Soma, Toshiaki Takagi, Hiroshi Yagi, Takayuki Mori, Katsuhiro Shirakawa, Hiraku Murayama
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Patent number: 6580949Abstract: A flexible, thin implantable electrode lead can maintain a desired portion of a lead body (14) in a desired shape conforming to a body portion. The lead body (14) includes a conductor coil (30) obtained by helically winding at least one insulation-coated electrical conduction conductor wire, an insulating sheath (32) made of an electrically insulating resin material and covering the outer surface of the conductor coil, and a flexible reinforcing tube (40) formed to deform into a desired shape in the cavity of the conductor coil.Type: GrantFiled: July 20, 2000Date of Patent: June 17, 2003Assignee: Terumo Kabushiki KaishaInventors: Fuminori Tsuboi, Katsuhiro Shirakawa
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Publication number: 20030088302Abstract: An electrode lead, which is used as an implantable electrode lead and a symptom of disconnection of which can be found and detected at an early stage before complete disconnection. Also, an implantable medical instrument which uses this electrode lead safely is provided. More specifically, in an implantable electrode lead obtained by connecting conductor wires 23 and 27 with large electrical resistances and conductor wires 20 and 26 with small electrical resistances parallel to each other, when one of the low-strength conductor wires 20 and 26 is disconnected, a change in electrical resistance of the implantable electrode lead can be detected and informed. Hence, a symptom before total disconnection of the implantable electrode lead can be detected.Type: ApplicationFiled: January 29, 2002Publication date: May 8, 2003Inventors: Katsuhiro Shirakawa, Yoshizo Ishizuka, Fuminori Tsuboi
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Patent number: 6289250Abstract: In order to increase durability against repeated flexure caused in a body tissue or flexure having a very small radius of curvature, and to reduce mechanical stress applied by a lead body on the body tissue, a lead body (20) of an implantable electrode lead is constituted by a conductive coil (24) and a sheath (22). The conductive coil (24) is obtained by helically winding a conductive wire (26), formed with an insulating coating layer (28) and having a diameter (d), to have a coil pitch diameter (mean diameter) (D). The sheath (22) is made of an electrical insulating material. An outer diameter G of the lead body (20) is set to 2 mm or less. The sheath (22) is formed of a soft material having a Shore hardness of 80A or less. The conductive coil (24) is set to have a spring index (D/d) of 7.8 or more.Type: GrantFiled: September 3, 1999Date of Patent: September 11, 2001Assignee: Kabushiki Kaisha Cardio-Pacing Research LaboratoryInventors: Fuminori Tsuboi, Katsuhiro Shirakawa, Kunimasa Katayama
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Patent number: D611601Type: GrantFiled: October 17, 2007Date of Patent: March 9, 2010Assignee: Terumo Kabushiki KaishaInventors: Noriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi, Tomokane Kurosawa