Patents by Inventor Tomohiko Asahara
Tomohiko Asahara 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: 7867230Abstract: This invention provides bipolar forceps that are used for coagulation, dissection or similar surgical manipulation by the application of a high-frequency current in a surgical operation, which suppresses attachment and sticking of burned protein to arm tip end portions irrespective of the properties of the metal material forming the arms. The bipolar forceps according to the present invention have on each of opposed surfaces 1a of the tip end portions 1 of a pair of arms a composite plating film 3 composed of a noble metal material 3a and nonconductive fine particles 3b, and a laminate plating film 4 of a noble metal material formed on the composite plating film 3.Type: GrantFiled: April 4, 2006Date of Patent: January 11, 2011Assignee: Johnson & Johnson Kabushiki KaishaInventors: Tomohiko Asahara, Takeshi Mikami, Kiyohiro Houkin
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Publication number: 20080107703Abstract: Disclosed is a substantially water-based medical hydrogel having at least 0.010 but no more than 50 crosslink points per molecule, as well as a dried material thereof. The hydrogel is obtained by crosslinking a gelatin having 20 to 30 amino groups per molecule and the same or greater number of carboxyl groups per molecule or a gelatin derivative having 2 to 100 amino groups per molecule and 50 or more carboxyl groups per molecule. According to the present invention, a medical hydrogel with properties appropriate to the intended use can be reliably prepared. In particular a continuous delivery interval can be reliably achieved by using the hydrogel of the invention as a drug delivery vehicle.Type: ApplicationFiled: February 14, 2006Publication date: May 8, 2008Inventors: Yasuhiko Tabata, Tomohiko Asahara
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Publication number: 20060276785Abstract: This invention provides bipolar forceps that are used for coagulation, dissection or similar surgical manipulation by the application of a high-frequency current in a surgical operation, which suppresses attachment and sticking of burned protein to arm tip end portions irrespective of the properties of the metal material forming the arms. The bipolar forceps according to the present invention have on each of opposed surfaces 1a of the tip end portions 1 of a pair of arms a composite plating film 3 composed of a noble metal material 3a and nonconductive fine particles 3b, and a laminate plating film 4 of a noble metal material formed on the composite plating film 3.Type: ApplicationFiled: April 4, 2006Publication date: December 7, 2006Inventors: Tomohiko Asahara, Takeshi Mikami, Kiyohiro Houkin
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Patent number: 7041713Abstract: The present invention provides an artificial dura mater which comprises an amorphous or low crystallinity polymer as a constituent component and which prevents the cerebrospinal fluid leakage.Type: GrantFiled: April 27, 2001Date of Patent: May 9, 2006Assignee: Gunze LimitedInventors: Koji Yamauchi, Tomohiko Asahara
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Patent number: 6846330Abstract: The present invention provides an artificial dura mater characterized by comprising at least a sheet of a biodegradable and bioabsorbable synthetic polymer and having a storage modulus at ordinary temperature of from 1×107 to 5×108 (Pa); and a process for producing an artificial dura mater characterized by dissolving a lactide/?-caprolactone copolymer (in a molar ratio ranging from 40/60 to 60/40) in a solvent, filtering the resultant solution and casting the same followed by air drying.Type: GrantFiled: December 5, 2002Date of Patent: January 25, 2005Assignee: Gunze LimitedInventors: Koji Yamauchi, Yoshito Ikada, Susumu Miyamoto, Keisuke Yamada, Tomohiko Asahara
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Patent number: 6679919Abstract: The present invention provides an artificial dura mater prepared from an biodegradable and bioabsorbable synthetic polymer sheet and having a total light transmittance of 30% or more as defined by JIS K7105, a haze (cloudiness value) of 80% or less as defined by JIS K7105 or a specular glossiness at 60° (Gs 60°) of 10-20% as defined by JIS Z8741.Type: GrantFiled: April 19, 2000Date of Patent: January 20, 2004Assignee: Gunze LimitedInventors: Koji Yamauchi, Tomohiko Asahara
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Publication number: 20030132546Abstract: The present invention provides an artificial dura mater characterized by comprising at least a sheet of a biodegradable and bioabsorbable synthetic polymer and having a storage modulus at ordinary temperature of from 1×107 to 5×108 (Pa); and a process for producing an artificial dura mater characterized by dissolving a lactide/&egr;-caprolactone copolymer (in a molar ratio ranging from 40/60 to 60/40) in a solvent, filtering the resultant solution and casting the same followed by air drying.Type: ApplicationFiled: December 5, 2002Publication date: July 17, 2003Inventors: Koji Yamauchi, Yoshito Ikada, Susumu Miyamoto, Keisuke Yamada, Tomohiko Asahara
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Patent number: 6514291Abstract: The present invention provides an artificial dura mater characterized by comprising at least a sheet of a biodegradable and bioabsorbable synthetic polymer and having a storage modulus at ordinary temperature of from 1×107 to 5×108 (Pa); and a process for producing an artificial dura mater characterized by dissolving a lactide/&egr;-caprolactone copolymer (in a molar ratio ranging from 40/60 to 60/40) in a solvent, filtering the resultant solution and casting the same followed by air drying.Type: GrantFiled: April 6, 2000Date of Patent: February 4, 2003Assignee: Gunze LimitedInventors: Koji Yamauchi, Yoshito Ikada, Susumu Miyamoto, Keisuke Yamada, Tomohiko Asahara
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Publication number: 20030014125Abstract: The present invention provides an artificial dura mater prepared from an biodegradable and bioabsorbable synthetic polymer sheet and having a total light transmittance of 30% or more as defined by JIS K7105, a haze (cloudiness value) of 80% or less as defined by JIS K7105 or a specular glossiness at 60° (Gs 60°) of 10-20% as defined by JIS Z8741.Type: ApplicationFiled: April 19, 2000Publication date: January 16, 2003Inventors: KOJI YAMAUCHI, TOMOHIKO ASAHARA
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Patent number: 6048341Abstract: A grooved channel serving as perfusion leading structure is formed between the opening of a perfusion tube at its front end and the bipolar electric coagulating and dissecting portions at the front ends of arms.Type: GrantFiled: November 21, 1997Date of Patent: April 11, 2000Assignee: Johnosn & Johnson Medical Kabushiki KaishaInventors: Wataru Hirakawa, Keiji Nakano, Tomohiko Asahara, Nobuhiro Kagaminuma
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Patent number: 5464405Abstract: Embedding a perfusion passage pipe in the surface at the inside of one of the arms of a tweezers partially or entirely and concurrently, fastening a housing portion in the rear of the grip portion in a range of 90.degree. to 170.degree. angled from the tip portion to the central axis of the grip portion of an arm.Type: GrantFiled: January 18, 1994Date of Patent: November 7, 1995Assignee: Ethicon Endo-Surgery, Inc.Inventors: Kazuhiko Fujitsu, Tomohiko Asahara, Nobuhiro Kagaminuma, Kohichi Iwai
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Patent number: 5364409Abstract: The invention provides a needle holding arrangement for only the gripping of a needle within the body cavity. There is provided a suture fixing means for gripping or fixing a suture with a needle on an outer peripheral surface of the needle-holder shaft. After piercing and passing of the needle through the tissue in the body, a knot of the suture can be made within the body cavity, and saturation and ligation of tissues in the body and end closure and ligation of blood vessel and gall duct can also be performed.Type: GrantFiled: May 4, 1993Date of Patent: November 15, 1994Assignee: Ethicon, Inc.Inventors: Masayoshi Kuwabara, Tomohiko Asahara, Noboru Ujiie, Nobuhiro Kagaminuma
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Patent number: 5224948Abstract: The present invention provides a deep suturer suitable for suturing a deep portion and a narrow portion which are difficult to be applied by a normal direct hand operation such as transoral operation. The suturer comprises an end needle-holding portion (B) for holding a suture needle, a holder portion (A) for operating the end needle-holding portion (B) and a connection portion (C) for operatively connect the end needle-holding portion (B) and holder portion (B) is provided with a disk head (4) which is rotated integral with a needle-holding portion (5) the holder portion (A) is provided with a handle (2), and the connection portion (C) is provided with a rod (7) having one end connected to the handle (2) through a connecting mechanism (18) and the other end connected to the disk head (4), the rod (7) being axially slidably inserted by of a spring force.Type: GrantFiled: October 23, 1991Date of Patent: July 6, 1993Assignee: Ethicon, Inc.Inventors: Hiroshi Abe, Tomohiko Asahara
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Patent number: 3939636Abstract: A mixed yarn having a uniform dyeability to an acid dye, which comprises at least two kinds of polyamide filaments differing in shrinkage, each consisting mainly of repeating units represented by the following general formula: ##SPC1##Type: GrantFiled: July 24, 1974Date of Patent: February 24, 1976Assignee: Toray Industries, Inc.Inventors: Yuzaburo Nakayama, Akinori Yamamoto, Tomohiko Asahara, Masaharu Shimamura, Yoshizo Tsuda, Keisuke Igawa, Mitsuhiro Okamoto