Patents by Inventor Masaharu Takayama

Masaharu Takayama 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).

  • Publication number: 20240132147
    Abstract: A vehicle power supply system includes a power source control device that executes a process of switching a connection state of a driving circuit to the main power source and an auxiliary power source including; a process of switching the connection state so as to transition to a backup state as a voltage decrease of the main power source occurs, and a process of switching the connection state so as to transition to a normal state as the voltage decrease of the main power source is resolved. After a voltage decrease of the main power source occurs, a turning-side control device of a steering control unit sets an output-limited state for a turning-side motor. The output-limited state is canceled upon the power source control device completing switching of the connection state so as to transition.
    Type: Application
    Filed: October 11, 2023
    Publication date: April 25, 2024
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Yuuta KAJISAWA, Yuji FUJITA, Yugo NAGASHIMA, Kazuma HASEGAWA, Takashi KOUDAI, Kaishi MONOBE, Kenichi ABE, Masaharu YAMASHITA, Shintaro TAKAYAMA, Kazuaki IIDA, Yasushi HORA, Yosuke YAMASHITA, Hiroki TOMIZAWA, Nobuyori NAKAJIMA, Hayaki TANABE, Toyohiro HAYASHI, Takeshi IWANA
  • Publication number: 20240124047
    Abstract: A steering control device configured to control a steering device, the steering device including a steering shaft to which a handle is detachably coupled and a motor configured to generate torque that is given to the steering shaft. The steering control device includes a processing circuit configured to execute a process for controlling driving of the motor. The process for controlling the driving of the motor includes a lock process of driving the motor such that a rotation position of the steering shaft is fixed at a specific position, in a state where the handle has been detached from the steering shaft.
    Type: Application
    Filed: October 11, 2023
    Publication date: April 18, 2024
    Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Taiki MATSUMOTO, Kenichi ABE, Yuuta KAJISAWA, Yugo NAGASHIMA, Kazuma HASEGAWA, Takashi KOUDAI, Yosuke YAMASHITA, Shintaro TAKAYAMA, Hiroyuki KATAYAMA, Masaharu YAMASHITA
  • Publication number: 20040044429
    Abstract: An optimal section setting program capable of setting in a short time and with accuracy an optimal section having a desired strength at the minimum cost without depending on skill of a designer is provided.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 4, 2004
    Inventors: Makoto Takeda, Masaharu Takayama, Tomoki Mizobuchi, Hiroshi Hirayama, Junichi Fukushima, Shoji Iijima, Chikao Hishinuma
  • Patent number: 6686172
    Abstract: The present invention provides a method and a kit for detecting or quantitatively determining homocysteine rapidly and simply and with high sensitivity by oxidizing the residual homocysteine cosubstrate, the produced homocysteine-converting enzyme product or an enzyme reaction product thereof in the presence of an SH reagent to produce hydrogen peroxide and determining the produced hydrogen peroxide by color development using an oxidative color-developing agent. By using the method and kit of the present invention, homocysteine in biological samples, in particular, in body fluids such as blood and urine can be detected and quantitatively determined rapidly and simply and with high sensitivity.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: February 3, 2004
    Assignee: Azwell, Inc.
    Inventors: Naoto Matsuyama, Mina Fukuhara, Masaharu Takayama, Koji Mizuno
  • Publication number: 20020123088
    Abstract: The present invention provides a method and a kit for detecting or quantitatively determining homocysteine rapidly and simply and with high sensitivity by oxidizing the residual homocysteine cosubstrate, the produced homocysteine-converting enzyme product or an enzyme reaction product thereof in the presence of an SH reagent to produce hydrogen peroxide and determining the produced hydrogen peroxide by color development using an oxidative color-developing agent. By using the method and kit of the present invention, homocysteine in biological samples, in particular, in body fluids such as blood and urine can be detected and quantitatively determined rapidly and simply and with high sensitivity.
    Type: Application
    Filed: February 28, 2002
    Publication date: September 5, 2002
    Inventors: Naoto Matsuyama, Mina Fukuhara, Masaharu Takayama, Koji Mizuno
  • Patent number: 4571383
    Abstract: Reagent for the measurement of direct bilirubin comprising a buffer solution having a pH range of 3.5 to 4.5 which contains bilirubin oxidase, preferably in the form of a test kit consisting essentially of (i) a buffer solution having a pH range of 3.5 to 4.5, (ii-a) a lyophilized bilirubin oxidase, (ii-b) a buffer solution for dissolving the lyophilized bilirubin oxidase, and (iii) a standard serum containing a prescribed amount of bilirubin, and a method for measurement of direct bilirubin by using the reagent. The reagent and method are useful for diagnosis of various diseases, for example, various hepatic diseases (e.g. jaundice) and cholepathia.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: February 18, 1986
    Assignee: Nippon Shoji Kaisha, Ltd.
    Inventors: Masaharu Takayama, Seiichi Taniguchi, Masayasu Enomoto, Masahiro Muramoto
  • Patent number: 4012514
    Abstract: Novel olefinic aryl ketone compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, halogen, C.sub.1-4 alkyl, or C.sub.1-4 alkoxy, R.sup.2 is hydrogen or halogen, and X is a group of the formula: ##STR2## and their non-toxic salts, which possess various useful pharmacological activities and can be produced by reaction of an acetylenic alcohol of the formula: ##STR3## wherein R.sup.1 and R.sup.2 are each as defined above with formaldehyde and an piperidine compound of the formula: , or its non-toxic salt; reduction of the resultant acetylenic aryl alcohol; and oxidation of the resultant olefinic aryl alcohol.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: March 15, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Junki Katsube, Masaru Nakao, Kikuo Sasajima, Isamu Maruyama, Masaharu Takayama, Keiichi Ono, Shigenari Katayama, Yoshihiro Tanaka, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4012515
    Abstract: Novel olefinic aryl ketone compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, halogen, C.sub.1.sub.-4 alkyl, or C.sub.1.sub.-4 alkoxy, R.sup.2 is hydrogen or halogen, and R.sup.3 and R.sup.4 are each hydrogen, halogen, C.sub.1.sub.-4 alkyl or trifluoromethyl, and their non-toxic salts, which possess various useful pharmacological activities and can be produced by reaction of an acetylenic alcohol of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above, with formaldehyde and an amine of the formula: ##STR3## wherein R.sup.3 and R.sup.4 are each as defined above; reduction of the resultant acetylenic aryl alcohol; and oxidation of the resultant olefinic aryl alcohol.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: March 15, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Junki Katsube, Masaru Nakao, Kikuo Sasajima, Isamu Maruyama, Masaharu Takayama, Keiichi Ono, Shigenari Katayama, Yoshihiro Tanaka, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4007091
    Abstract: A method for measuring the activity of lecithin cholesterol acyl transferase (LCAT) comprising adding a test sample (a blood serum or plasma) to a lecithin substrate solution containing a lecithin and a nonionic surfactant, incubating the mixture and then measuring the changed amount of the free cholesterol in the reaction system by an optical analysis, and the lecithin substrate solution useful therefor. The method of the present invention is useful for the clinical test for the liver function of patients and further for the diagnosis of the diseases, such as lipidosis and diabetes.
    Type: Grant
    Filed: April 29, 1976
    Date of Patent: February 8, 1977
    Assignee: Nippon Shoji Kaisha, Limited
    Inventors: Toshihide Nagasaki, Masaharu Takayama, Akiyoshi Uesugi, Isao Tanimizu, Kazuto Shintani
  • Patent number: 3979390
    Abstract: A process for producing butyrophenone derivatives of the formula: ##EQU1## which comprises reacting a compound of the formula: ##SPC1##With an amine of the formulaH-W(wherein Ar represents a group of either one of the formulas: ##SPC2##Z is a secondary amino group and W is the residue of an amine excluding a hydrogen atom therefrom). The said butyrophenone derivatives and their salts exhibit a variety of beneficial pharmacological activities including a central and autonomic nervous system depressing activity.
    Type: Grant
    Filed: March 16, 1973
    Date of Patent: September 7, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Sasajima, Keiichi Ono, Masaru Nakao, Isamu Maruyama, Masaharu Takayama, Shigenari Katayama, Junki Katsube, Shigeho Inaba, Hisao Yamamoto