Patents by Inventor Tomio Ohta

Tomio Ohta 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).

  • Patent number: 6855122
    Abstract: There is provided an apparatus which reduces a bleeding amount upon an operation. A bloodless treating apparatus used upon a surgical treatment of an objet comprises: (A) a fluid replacement supply unit which quantitatively supplies a fluid replacement into a blood vessel leading to the object (24); and (B) a fluid replacement withdrawing unit which quantitatively withdraws the fluid replacement having passed through the object (24) from a blood vessel coming from the object.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: February 15, 2005
    Assignees: Nikkiso Co., Ltd.
    Inventors: Tomio Ohta, Tetsuya Miyatake, Yoshihiko Kinoshita
  • Patent number: 6626857
    Abstract: An extracorporeal circulation apparatus used for the selective temperature controlling method in which a temperature of an object is kept at a predetermined temperature, includes: (A) a fluid replacement supply unit which quantitatively supplies a fluid replacement of which temperature has been adjusted into a blood vessel; (B) a blood concentration unit which quantitatively withdraws blood diluted by the fluid replacement from a blood vessel and concentrates the withdrawn diluted blood; and (C) a blood supply unit which controls a temperature of the blood which has been concentrated and quantitatively supplies the concentrated blood into a blood vessel, the blood concentration unit comprising a diluted blood temperature sensor which measures a temperature of the withdrawn diluted blood, and the fluid replacement supply unit including a means which controls a temperature of the fluid replacement to be supplied based on a different extent between the measured diluted blood temperature and the predetermined
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: September 30, 2003
    Assignees: Nikkiso Co., Ltd.
    Inventors: Tomio Ohta, Tetsuya Miyatake, Yoshihiko Kinoshita, Tomoya Murakami
  • Patent number: 6336910
    Abstract: An extracorporeal circulation apparatus capable of maintaining hypothermia for a prolonged period when used in the selective cooling method. The extracorporeal circulation apparatus used in the selective cooling method includes (1) a diluent supply unit for cooling a diluent and metering the diluent into a blood vessel; (2) a blood concentration unit for metering a diluted blood out from a blood vessel and concentrating the diluted blood thus drawn out by filtering the diluted blood; and (3) a blood supply unit for heating the concentrated blood and metering the concentrated blood into a blood vessel, wherein a flow rate of the injected diluent flow rate, Vd and a flow rate of a filtrate, Vb are so controlled that a relationship 0.1 Vd≦Vb≦Vd is maintained.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: January 8, 2002
    Assignee: Tomio Ohta
    Inventors: Tomio Ohta, Takuichi Kobayashi
  • Patent number: 5576324
    Abstract: A quinoline derivative represented by general formula (1), a medicinally acceptable salt thereof, and a remedy for cardiac diseases containing the same: ##STR1## [wherein ring A represents a furan, dihydrofuran or dioxolane ring, and R.sup.1 represents an aminoalkyl group].The compound (1) has a positively inotropic effect on myocardia and an antiarrhythmic effect, and can dilate blood vessels without extremely increasing the heart rate. Therefore, a remedy for cardiac diseases containing the same as the active ingredient is remarkably useful for treating cardiac insufficiency, arrhythmia, and so forth.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: November 19, 1996
    Assignee: Kowa Co., Ltd.
    Inventors: Yoshinori Kyotani, Tadaaki Ohgiya, Tsutomu Toma, Yuji Kurihara, Takahiro Kitamura, Takashi Yamaguchi, Kazuhiro Onogi, Seiichi Sato, Hiromichi Shigyo, Tomio Ohta, Mitsuo Kawada, Yasumi Uchida
  • Patent number: 5510366
    Abstract: An indole derivative represented by formula (1), ##STR1## wherein A is a group ##STR2## wherein R.sup.10 is hydrogen or lower alkyl, dotted lines may optionally be present, and R.sup.1 -R.sup.9 represents various substitutional groups. The compound (1) exhibits a positive inotropic action on cardiac muscle, an anti-arrhythmic action, and a vasodilation action without increasing the heart rate. A heart affection therapeutic agent comprising this compound as an effective component is extremely effective for treating heart failures and arrhythmia.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: April 23, 1996
    Assignee: Kowa Co., Ltd.
    Inventors: Yoshinori Kyotani, Katsumi Kawamine, Tsutomu Toma, Tadaaki Ohgiya, Takashi Yamaguchi, Kazuhiro Onogi, Seiichi Sato, Noboru Shimizu, Hiromichi Shigyo, Tomio Ohta, Toshiaki Oda, Yukihiro Okuno, Kimiyuki Shibuya, Yoshio Takahashi, Mikio Fujii, Yasumi Uchida
  • Patent number: 5389630
    Abstract: Diamine compounds of formula (I) or an addition salt thereof are provided: ##STR1## These compounds have an excellent cerebral protective action, are very safe, and exhibit a strong action when orally administered, and therefore, medicines containing such compounds are effective for treating disorders caused by cerebral hemorrhage, cerebral infarction, subarachnoid hemorrhage, transient ischemic attack, cerebrovascular disorders and the like, or preventing progress of such disorders.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: February 14, 1995
    Assignee: Kowa Co., Ltd.
    Inventors: Seiichi Sato, Kiyoshi Kawamura, Yoshio Takahashi, Koichiro Watanabe, Sadahiro Shimizu, Tomio Ohta
  • Patent number: 4960883
    Abstract: A propane derivative represented by the following formula ##STR1## wherein R represents a lower alkyl group; one of A and B represents a group of the formula ##STR2## and the other represents a group of the formula ##STR3## in which R.sup.1 and R.sup.2 are identical or different and each represents a hydrogen atom, a lower alkyl group, an aryl group or an aralkyl group, R.sup.3 represents a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and X represents a sulfonyl group or a carbonyl group,and an acid addition salt thereof. The compounds provided by this invention have useful biological activities such as the spasmolytic activity on the vascular smooth muscles and anti-platelet aggregatory activity and are useful as drugs for treating cardiovascular diseases such as angina pectoris, cerebral circulation disorder and thrombosis.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: October 2, 1990
    Assignee: Kowa Company, Ltd.
    Inventors: Sohei Tanabe, Seiichi Sato, Yoshinori Kyotani, Tomio Ohta, Yasumi Uchida
  • Patent number: 4948892
    Abstract: A sulfonamide compound represented by the following formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are identical or different, and each represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; R.sup.4 represents a hydrogen atom, a lower alkyl group, or a substituted or unsubstituted aralykyl group; R.sup.5 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group; R.sup.6 and R.sup.7 are identical or different and each represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n is an integer of 1 to 8,and an acid addition salt thereof. The compounds of formula (I) provided by this invention have some useful biological activities such as the spasmolytic activity on the vascular smooth muscles and anti-platelet aggregatory activity and are useful as drugs for treating cardiovascular disorders such as angina pectoris, cerebral circulation disorder and thrombosis.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: August 14, 1990
    Assignee: Kowa Comp., Ltd.
    Inventors: Sohei Tanabe, Seiichi Sato, Yoshinori Kyotani, Tomio Ohta, Yasumi Uchida
  • Patent number: 4886822
    Abstract: A substituted anilide derivative of the formula ##STR1## wherein R.sub.1 represents a mononuclear or binuclear heterocyclic group which contains 1 to 3 nitrogen atoms as ring members and may have a substituent.A represents a single bond, a carbonyl group, a sulfur atom, or a lower alkylene group which may be substituted by a hydroxyl group,R.sub.2 represents a hydrogen atom, a halogen atom, a lower alkyl group, a trifluoromethyl group, a lower alkenyloxy group, or a C.sub.1 -C.sub.14 alkoxy group which may have a substituent,R.sub.3 and R.sub.4 are identical or different, and each represents a hydrogen atom, a lower alkyl group, a phenyl group, or a phenyl(lower alkyl) group which may have a substitutent, or taken together, may form a saturated nitrogen-containing heterocyclic group together with the nitrogen atom to which they are bonded, andB represents a single bond or a lower alkylene group which may have a substituent,or an acid addition salt thereof.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: December 12, 1989
    Assignee: Kowa Company, Ltd.
    Inventors: Kimiyuki Shibuya, Yoshio Takahashi, Seiichi Sato, Hiromichi Shigyo, Tomio Ohta, Yasumi Uchida
  • Patent number: 4746737
    Abstract: Novel benzoyl esters of the following formula (I), and acid addition salts thereof, ##STR1## in which R.sub.1 and R.sub.2 are the same or different and represent a hydrogen atom or a lower alkoxy group, A represents a single bond, a linear or branched lower alkylene group, a lower alkenylene group, R.sub.3 and R.sub.4 are the same or different and represent a hydrogen atom or a lower alkyl group, or R.sub.3 and R.sub.4 join together to form a lower alkylene group, R.sub.5 represents a group of the formula, --X--(CO).sub.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: May 24, 1988
    Assignee: Kowa Co., Ltd.
    Inventors: Setsuro Fujii, Eizou Hattori, Mitsuteru Hirata, Koichiro Watanabe, Tomio Ohta, Nobuo Yokoo, Masahiko Nagakura
  • Patent number: 4737506
    Abstract: This invention relates to a 1,4-dihydropyridine-3,5-dicarboxylate derivative represented by the following general formula (I): ##STR1## wherein R means an imidazolyl or pyridyl group, R.sub.1 denotes a hydrogen or halogen atom or a nitro or trifluoromethyl group, R.sub.2 is a lower alkyl group, X is CH or N, A means a lower alkylene group, ##STR2## B being a lower alkylene or O-lower alkylene group, ##STR3## R.sub.4 being a hydrogen atom or lower alkyl group, or ##STR4## m denotes a number of 1-3, and n stands for 1 or 2. The derivative has vasodilative effects, hyperkinemic effects, platelet aggregation inhibitory effects, thromboxane A.sub.2 formation inhibitory effects and so on, and are hence useful as a pharmaceutical product such as vasodilator, antihypertensive, antithrombotic agent, antiarteriosclerotic agent or the like.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: April 12, 1988
    Assignee: Kowa Co., Ltd.
    Inventors: Noboru Shimizu, Hiroyuki Ishiwata, Tomio Ohta, Hiroshi Ishihama, Yasumi Uchida
  • Patent number: 4567890
    Abstract: A pair of bipolar diathermy forceps used for surgery having two arms electrically insulated from each other and adapted to keep opening their tips usually, comprising a tube which extends toward the inside tips of the arms and which is mounted along a groove, the said groove is provided on either or both of the arms, an elongate section which follows the said groove, an operational section inserted between two arms whereby a hole of the tube is open, when the said arms are closed and is closed when they are open, and a pouring section of physiological saline which is connected to the end of the tube. Irrigation is started when the arms are closed and is stopped when they are open automatically. When the tissue is held by the tips of arms and supplied with the current, the coagulation is caused by the high frequency conducted, whereby the control of hemorrhage is completed. The frequent saline irrigation of the work area in microsurgery and the dilution of a little bleeding can be obtained.
    Type: Grant
    Filed: August 7, 1984
    Date of Patent: February 4, 1986
    Inventors: Tomio Ohta, Noboru Funatsu