Patents by Inventor Masaaki Toyama
Masaaki Toyama 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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Publication number: 20230192622Abstract: The present invention relates to an anti-SARS-CoV-2 drug including, as an active ingredient, a compound represented by formula (I): [wherein R1 is C1-C8 alkyl or the like; and R2-R9 is hydrogen, halogen, hydroxyl, or Q-(C1-C8 alkyl), (Q is O, NH, or S) or the like], or a pharmaceutically acceptable salt thereof.Type: ApplicationFiled: May 17, 2021Publication date: June 22, 2023Applicant: ONCOLYS BIOPHARMA, INC.Inventors: Masanori Baba, Mika OKAMOTO, Masaaki TOYAMA, Yuichi HASHIMOTO, Hiromasa HASHIMOTO
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Patent number: 11001557Abstract: The present invention pertains to an antiviral drug for severe fever with thrombocytopenia syndrome, which contains a compound represented by formula (I) or a salt thereof, or a solvate of the compound or salt (In the formula, R1 and R2 are the same or different from each other, and each represents a substituted or unsubstituted C1-10 alkyl group, R1 and R2 may form a substituted or unsubstituted 5- or 6-member ring in conjunction with an adjacent nitrogen atom, and X represent a halogen atom.Type: GrantFiled: January 16, 2018Date of Patent: May 11, 2021Assignees: Kagoshima University, Nobelpharma Co., Ltd.Inventors: Masanori Baba, Masaaki Toyama, Norikazu Sakakibara
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Publication number: 20190389803Abstract: The present invention pertains to an antiviral drug for severe fever with thrombocytopenia syndrome, which contains a compound represented by formula (I) or a salt thereof, or a solvate of the compound or salt (In the formula, R1 and R2 are the same or different from each other, and each represents a substituted or unsubstituted C1-10 alkyl group, R1 and R2 may form a substituted or unsubstituted 5- or 6-member ring in conjunction with an adjacent nitrogen atom, and X represent a halogen atom.Type: ApplicationFiled: January 16, 2018Publication date: December 26, 2019Applicants: Kagoshima University, Nobelpharma Co., Ltd.Inventors: Masanori BABA, Masaaki TOYAMA, Norikazu SAKAKIBARA
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Patent number: 7355326Abstract: A piezoelectric transformer, which operates in a half wavelength mode, includes an input part having input electrodes laminated in a thickness direction on a central part in a longitudinal direction of a piezoelectric element with rectangular shape, in which the input part is polarized in the thickness direction between the input electrodes, a pair of output parts provided along the longitudinal direction so as to sandwich the input part, in which the output parts are polarized in the same direction along the longitudinal direction, and an output electrode provided at an end part of each of the output parts, wherein L1, L2 and L3 satisfy a relationship of 0.1?(4L2?L3)/4L1?0.5, where L1 is a length of the piezoelectric element in the longitudinal direction, L2 is a length of the input part in the longitudinal direction, and L3 is a length of either one of the output electrodes in the longitudinal direction.Type: GrantFiled: September 24, 2004Date of Patent: April 8, 2008Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama
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Publication number: 20070001554Abstract: A piezoelectric transformer, which operates in a half wavelength mode, includes an input part having input electrodes laminated in a thickness direction on a central part in a longitudinal direction of a piezoelectric element with rectangular shape, in which the input part is polarized in the thickness direction between the input electrodes, a pair of output parts provided along the longitudinal direction so as to sandwich the input part, in which the output parts are polarized in the same direction along the longitudinal direction, and an output electrode provided at an end part of each of the output parts, wherein L1, L2 and L3 satisfy a relationship of 0.1?(4L2?L3)/4L1?0.5, where L1 is a length of the piezoelectric element in the longitudinal direction, L2 is a length of the input part in the longitudinal direction, and L3 is a length of either one of the output electrodes in the longitudinal direction.Type: ApplicationFiled: September 24, 2004Publication date: January 4, 2007Inventors: Takeshi Fujimura, Masaaki Toyama
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Patent number: 6882090Abstract: Of a plurality of surfaces forming its shape, a piezoelectric transformer 13A has two types of output electrodes 22 and 23 on one surface in the longitudinal direction and two opposing surfaces in the lateral direction. This piezoelectric transformer 13A can be driven by properly switching first and second resonance modes different from each other. In a strobe apparatus, a discharge capacitor 3 is charged by a voltage generated in the output voltage 23 when the piezoelectric transformer 13A is driven in the first resonance mode, and a discharge tube 4 is triggered by a voltage generated in the output electrode 22 when the piezoelectric transformer 13A is driven in the second resonance mode.Type: GrantFiled: October 24, 2002Date of Patent: April 19, 2005Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama, Katsuyuki Ishikawa
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Patent number: 6873086Abstract: A strobe apparatus has a discharge capacitor charged by a voltage generated in the output voltage when a piezoelectric transformer is driven in the first resonance mode, and a discharge tube is triggered by a voltage generated in the output electrode when the piezoelectric transformer is driven in the second resonance mode. The transformer has two types of output electrodes and on one surface in the longitudinal direction and two opposing surfaces in the lateral direction. It can be driven by properly switching first and second resonance modes different from each other.Type: GrantFiled: June 17, 2004Date of Patent: March 29, 2005Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama, Katsuyuki Ishikawa
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Publication number: 20040222718Abstract: A strobe apparatus has a discharge capacitor charged by a voltage generated in the output voltage when a piezoelectric transformer is driven in the first resonance mode, and a discharge tube is triggered by a voltage generated in the output electrode when the piezoelectric transformer is driven in the second resonance mode. The transformer has two types of output electrodes and on one surface in the longitudinal direction and two opposing surfaces in the lateral direction. It can be driven by properly switching first and second resonance modes different from each other.Type: ApplicationFiled: June 17, 2004Publication date: November 11, 2004Applicant: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama, Katsuyuki Ishikawa
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Publication number: 20030102775Abstract: Of a plurality of surfaces forming its shape, a piezoelectric transformer 13A has two types of output electrodes 22 and 23 on one surface in the longitudinal direction and two opposing surfaces in the lateral direction. This piezoelectric transformer 13A can be driven by properly switching first and second resonance modes different from each other. In a strobe apparatus, a discharge capacitor 3 is charged by a voltage generated in the output voltage 23 when the piezoelectric transformer 13A is driven in the first resonance mode, and a discharge tube 4 is triggered by a voltage generated in the output electrode 22 when the piezoelectric transformer 13A is driven in the second resonance mode.Type: ApplicationFiled: October 24, 2002Publication date: June 5, 2003Applicant: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Masaaki Toyama, Katsuyuki Ishikawa
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Patent number: 6486612Abstract: In a piezoelectric transformer control circuit, when a load (2) is disconnected from a piezoelectric transformer (1) and changes to an open state, an output detection voltage (Vdet) becomes higher than a reference voltage (Vref2), and the output from a voltage comparator (10a) goes “Low”. When the output of the piezoelectric transformer (1) is short-circuited to GND, the output detection voltage (Vdet) abruptly drops to almost “0” and becomes lower than a reference voltage (Vref3). The output from a voltage comparator (10b) goes “Low”. A voltage-controlled oscillation circuit (6) detects the signal “Low” to stop the generation of the oscillation signal to a driving circuit (7) for driving the piezoelectric transformer (1).Type: GrantFiled: November 16, 1999Date of Patent: November 26, 2002Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Katsuyuki Ishikawa, Masaaki Toyama
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Publication number: 20020011804Abstract: In a piezoelectric transformer control circuit, when a load (2) is disconnected from a piezoelectric transformer (1) and changes to an open state, an output detection voltage (Vdet) becomes higher than a reference voltage (Vref2), and the output from a voltage comparator (10a) goes “Low”. When the output of the piezoelectric transformer (1) is short-circuited to GND, the output detection voltage (Vdet) abruptly drops to almost “0” and becomes lower than a reference voltage (Vref3). The output from a voltage comparator (10b) goes “Low”. A voltage-controlled oscillation circuit (6) detects the signal “Low” to stop the generation of the oscillation signal to a driving circuit (7) for driving the piezoelectric transformer (1).Type: ApplicationFiled: November 16, 1999Publication date: January 31, 2002Inventors: TAKESHI FUJIMURA, KATSUYUKI ISHIKAWA, MASAAKI TOYAMA
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Patent number: 6262518Abstract: Mount terminals (4a, 5a, 6) are formed on end faces of a housing (1). These mount terminals serve to mount the housing (1) on a circuit board and also serves as lead electrodes for the outer and output electrodes of a piezoelectric device to be housed in the case. The piezoelectric device is fixed in the housing (1) by using the lead electrodes (4, 5) integrally formed with mount terminals (4a, 5a) and projections (2, 3).Type: GrantFiled: March 17, 2000Date of Patent: July 17, 2001Assignee: Taiheiyo Cement CorporationInventors: Katsuyuki Ishikawa, Takeshi Fujimura, Masaaki Toyama, Katsumi Uesawa
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Patent number: 6239558Abstract: In a piezoelectric transformer control circuit for driving a load (2) connected to a piezoelectric transformer (1), an oscillation signal as a basis of driving of the piezoelectric transformer (1) is oscillated, and the piezoelectric transformer (1) is driven by a driving circuit (4) on the basis of the oscillation signal. A pulse power supply circuit (5) for supplying a pulse voltage to the driving circuit (4) intermittently drives the driving circuit (4) by pulse-modulating the pulse voltage to be supplied to the driving circuit (4).Type: GrantFiled: February 26, 1999Date of Patent: May 29, 2001Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Katsuyuki Ishikawa, Masaaki Toyama
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Patent number: 6198198Abstract: When an input voltage rises, (the amplitude of) a sine-wave voltage for driving a piezoelectric transformer (1) increases, so that a detection voltage (Vti) rectified by a rectifying circuit (9) also increases. An output voltage from an error amplifier (10) for comparing the detection voltage (Vti) with a reference voltage (Vref2) rises. If the output voltage from the error amplifier (10) rises, a voltage-controlled oscillation circuit (11) decreases the duty ratio of an oscillation signal to be output. In a driving circuit (7), as the duty ratio of the oscillation signal decreases, the amplitude of a fundamental wave contained in a rectangular wave to be output decreases to be a small driving voltage to the piezoelectric transformer (1).Type: GrantFiled: August 5, 1999Date of Patent: March 6, 2001Assignee: Taiheiyo Cement CorporationInventors: Takeshi Fujimura, Katsuyuki Ishikawa, Masaaki Toyama
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Patent number: 6172447Abstract: In a piezoelectric transformer device (36), a plurality of inner electrodes are stacked on each other on the left side. These inner electrodes are alternately connected to each other through interlevel connection conductors to constitute two inner electrode groups. A secondary output electrode in the form of a mesh is formed near the end portion of the device (36) on the right side. Only primary input electrodes (1,2) connected to the two inner electrode groups, a secondary output electrode (40), and the lead electrode of the secondary output electrode in the form of a mesh are exposed on the same surface of the device.Type: GrantFiled: June 28, 1999Date of Patent: January 9, 2001Assignee: Taiheiyo Cement CorporationInventors: Katsuyuki Ishikawa, Takeshi Fujimura, Masaaki Toyama, Masako Kataoka, Toru Ezaki, Takahiro Yamakawa, Yoshikazu Inoue
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Patent number: 4676645Abstract: Optical instrument for measuring displacement comprising a movable diffraction grating used as a scale, a semiconductor laser device, photodetectors, and means for making two light beams diffracted by the diffraction grating interfere with each other in which displacement of said diffraction grating is measured, based on variations of interference signals. The laser device has a suitable coherency for making selectively two necessary light beams with equal optical path lengths interfere with each other.Type: GrantFiled: November 5, 1984Date of Patent: June 30, 1987Assignee: Sony Magnescale IncorporationInventors: Kayoko Taniguchi, Hideki Tsuchiya, Masaaki Toyama