Patents by Inventor Katsumi Itoh
Katsumi Itoh 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: 20090225070Abstract: Provided is a plasma display device for controlling the power voltage of a pre-drive circuit in a manner to correspond to the change in a display percentage. The plasma display device is characterized in that the display percentage of a display screen is detected from a signal inputted, so that the amplitude of a drive pulse to be fed to a sustain output element is controlled on the basis of the display percentage, and in that a sustain current to flow for a sustain period is detected by a sustain current detection circuit so that the amplitude of a drive pulse to be fed to the sustain output element is controlled on the basis of the detection result.Type: ApplicationFiled: August 4, 2005Publication date: September 10, 2009Inventors: Makoto Onozawa, Tomokatsu Kishi, Katsumi Itoh, Isao Furukawa
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Patent number: 7274342Abstract: A first signal line for supplying a potential to one terminal of a capacitive load, a first switch element for supplying a first potential to the first signal line, a first drive circuit for driving the first switch element, and a second signal line for supplying a second potential different from the aforesaid first potential to the one terminal of the capacitive load are included. A first capacitor is capable of supplying a lower potential than the first and the third potentials to the first signal line. A coil circuit is connected between the first signal line or the second signal line and a supply line for supplying the third potential. A floating power supply circuit supplies power supply voltage with a potential of the first signal line as a reference to the first drive circuit.Type: GrantFiled: August 13, 2004Date of Patent: September 25, 2007Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Makoto Onozawa, Shigetoshi Tomio, Tetsuya Sakamoto, Katsumi Itoh
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Publication number: 20050184977Abstract: A capacitive load drive circuit that has reduced power consumption due to residual carriers, and a PDP apparatus using the same, have been disclosed. In the drive circuit, the power consumption due to the residual carriers, which are formed when a diode provided in parallel to a switch circuit of the capacitive load drive circuit is brought into conduction, is reduced and the switch circuit connected in parallel to the diode is brought into conduction during a period of time from when the diode is brought into conduction until when the potential of a terminal to which the diode is connected changes. By bringing the switch circuit connected in parallel into conduction, a closed circuit is formed by the diode and the switch circuit and the residual carriers formed in the diode are reduced. The voltage of the closed circuit is substantially zero V and, therefore, power consumption is very small even if a current due to the residual carriers flows through the closed circuit.Type: ApplicationFiled: November 17, 2004Publication date: August 25, 2005Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Katsumi Itoh, Tomokatsu Kishi, Shigetoshi Tomio, Tetsuya Sakamoto, Isao Furukawa
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Publication number: 20050168410Abstract: A first signal line (OUTA) supplies a first electric potential to a terminal of an X-side of a load (20) through a switch (SW4). A second signal line (OUTB) supplies a second electric potential to the terminal of the X-side of the load (20) through a switch (SW5). Coil circuits (A and B) are connected between the first signal line (OUTA) and the second signal line (OUTB) and a ground. Furthermore, each of the coil circuits (A and B) is a circuit configured with, for example, a coil and a diode, and the coil is connected so as to carry out L-C resonance with the load (20) through the switches (SW4 and SW5).Type: ApplicationFiled: April 1, 2005Publication date: August 4, 2005Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Shigetoshi Tomio, Tomokatsu Kishi, Katsumi Itoh, Tetsuya Sakamoto, Fumitaka Asami
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Publication number: 20050134531Abstract: A first signal line for supplying a potential to one terminal of a capacitive load, a first switch element for supplying a first potential to the first signal line, a first drive circuit for driving the first switch element, and a second signal line for supplying a second potential different from the aforesaid first potential to the one terminal of the capacitive load are included. A first capacitor is capable of supplying a lower potential than the first and the third potentials to the first signal line. A coil circuit is connected between the first signal line or the second signal line and a supply line for supplying the third potential. A floating power supply circuit supplies power supply voltage with a potential of the first signal line as a reference to the first drive circuit.Type: ApplicationFiled: August 13, 2004Publication date: June 23, 2005Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Makoto Onozawa, Shigetoshi Tomio, Tetsuya Sakamoto, Katsumi Itoh
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Patent number: 6621234Abstract: The plasma display panel includes a pair of glass substrates forming therein display cells. One substrate has address electrodes and the other has sustain electrodes including X-electrodes and Y-electrodes. X-electrodes are connected to terminals of sustain pulse generating circuits provided on a printed circuit board, via intermediate circuit boards. The printed circuit board and the intermediate circuit boards are connected to each other by connectors having a first set of terminals connected to the first sustain pulse generating circuit and a second set of terminals connected to the second sustain pulse generating circuit. Terminals of first and second sets are arranged in a row alternately one by one, or group by group.Type: GrantFiled: June 8, 2001Date of Patent: September 16, 2003Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Katsumi Itoh, Yoshinori Okada, Hideaki Ohki, Tomokatsu Kishi
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Patent number: 6495604Abstract: The present invention provides a compound represented by the formula: wherein R represents an aliphatic hydrocarbon group optionally having substituents, an aromatic hydrocarbon group optionally having substituents, a heterocyclic group optionally having substituents, a group represented by the formula: OR1 (wherein R1 represents a hydrogen atom or an aliphatic hydrocarbon group optionally having substituents) or a group represented by the formula: wherein R1b represents a hydrogen atom or an aliphatic hydrocarbon group optionally having substituents, R1c is, same with or different from R1b, a hydrogen atom or an aliphatic hydrocarbon group optionally having substituents, R0 represents a hydrogen atom or an aliphatic hydrocarbon group, or R and R0 represents a bond with each other, Ar represents an aromatic hydrocarbon group optionally having substituents, and n is an integer of 1 to 4, or a salt thereof, which is a agent for preventing or treating diseaseType: GrantFiled: August 14, 2000Date of Patent: December 17, 2002Assignee: Takeda Chemical Industries, Ltd.Inventors: Yuzo Ichimori, Masayuki Ii, Katsumi Itoh, Tomoyuki Kitazaki, Junji Yamada
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Patent number: 6407129Abstract: A quaternized nitrogen-containing imidazol-1-yl or 1,2,4-triazol-1-yl compound wherein one of the nitrogen atoms constituting an azole ring is quaternized with a substituent capable of being eliminated in vivo and the substituent can be eliminated in vivo to be converted into an antifungal azole compound, has an improved solubility in water, can advantageously be applied to injection, has an improved internal absorption and can be expected to have a good effect for the treatment or prevention of disease.Type: GrantFiled: September 20, 1999Date of Patent: June 18, 2002Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Tomoyuki Kitazaki, Kenji Okonogi
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Publication number: 20020047586Abstract: The plasma display panel includes a pair of glass substrates forming therein display cells. One substrate has address electrodes and the other has sustain electrodes including X-electrodes and Y-electrodes. X-electrodes are connected to terminals of sustain pulse generating circuits provided on a printed circuit board, via intermediate circuit boards. The printed circuit board and the intermediate circuit boards are connected to each other by connectors having a first set of terminals connected to the first sustain pulse generating circuit and a second set of terminals connected to the second sustain pulse generating circuit. Terminals of first and second sets are arranged in a row alternately one by one, or group by group.Type: ApplicationFiled: June 8, 2001Publication date: April 25, 2002Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Katsumi Itoh, Yoshinori Okada, Hideaki Ohki, Tomokatsu Kishi
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Patent number: 6362206Abstract: The present invention provides an azole compound represented by the formula (I): wherein Ar is an optionally substituted phenyl group; R1 and R2, the same or different, are a hydrogen atom or a lower alkyl group, or R1 and R2 may combine together to form a lower alkylene group; R is a hydrogen atom or an acyl group; X is a nitrogen atom or a methine group; A is Y═Z (Y and Z, the same or different, are a nitrogen atom or a methine group optionally substituted with a lower alkyl group) or an ethylene group optionally substituted with a lower alkyl group; n is an integer from 0 to 2; and Az is an optionally substituted azolyl group, or its salt, which is useful for a prevention and therapy of a fungal infection of a mammal as a antifungal agent.Type: GrantFiled: October 7, 1999Date of Patent: March 26, 2002Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Akihiro Tasaka
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Patent number: 6057630Abstract: There is provided a surface acoustic wave device for use as a filter in a television receiver set which can reduce reflection waves generated from outermost electrodes of input and output interdigital transducers to improve various filter characteristics. In the surface acoustic wave device having, on a piezoelectric substrate, the input interdigital transducer for converting an electric signal into a surface acoustic wave and the output interdigital transducer, disposed to oppose the input interdigital transducer, for converting the surface acoustic wave resulting from the conversion by the input interdigital transducer into an electric signal, a first dummy electrode is provided to a first outermost electrode finger of the output interdigital transducer, the first outermost electrode finger being located at one end of the output interdigital transducer opposite to the input interdigital transducer, and having an electrode aperture length of .lambda.Type: GrantFiled: April 16, 1998Date of Patent: May 2, 2000Assignee: Hitachi Media Electronics Co., Ltd.Inventors: Hitoshi Yanagihara, Takashi Shiba, Katsumi Itoh, Akitsuna Yuhara
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Patent number: 6034248Abstract: The present invention provides an azole compound represented by the formula (I): ##STR1## wherein Ar is an optionally substituted phenyl group; R.sup.1 and R.sup.2, the same or different, are a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; R.sup.3 is a hydrogen atom or an acyl group; X is a nitrogen atom or a methine group; A is Y.dbd.Z (Y and Z, the same or different, are a nitrogen atom or a methine group optionally substituted with a lower alkyl group) or an ethylene group optionally substituted with a lower alkyl group; n is an integer from 0 to 2; and Az is an optionally substituted azolyl group, or its salt, which is useful for a prevention and therapy of a fungal infection of a mammal as a antifungal agent.Type: GrantFiled: October 17, 1996Date of Patent: March 7, 2000Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Akihiro Tasaka
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Patent number: 5792780Abstract: The present invention provides an azole compound represented by the formula (I): ##STR1## , wherein Ar is an optionally-substituted phenyl group; R.sup.1 and R.sup.2 are, the same or different, a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; R.sup.3 is a hydrogen atom or an acyl group; Y is a nitrogen atom or a methine group; and A is an optionally-substituted saturated cyclic amide group bonded through a first nitrogen atom, or a salt thereof, which is useful for prevention and therapy of fungal infections of mammals as antifungal agent.Type: GrantFiled: May 1, 1996Date of Patent: August 11, 1998Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Akihiro Tasaka
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Patent number: 5729076Abstract: A surface acoustic wave device having a novel structure capable of restricting TTE and ripple noise on a frequency characteristics and group delay time characteristics thereof is provided under a condition by which acoustic reflection is suppressed when there is internal dissipation in the device and/or a peripheral circuit thereof. When the device includes a unidirectional interdigital transducer, it is possible to restrict ripple of the frequency characteristics and the group delay time characteristics and to reduce loss without using a phase shifter. By using the surface acoustic wave device according to the present invention, a communication apparatus can be improved in performance.Type: GrantFiled: May 30, 1995Date of Patent: March 17, 1998Assignee: Hitachi, Ltd.Inventors: Yoshihiro Yamada, Takashi Shiba, Katsumi Itoh
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Patent number: 5677464Abstract: A compound of the formula (V): ##STR1## wherein Ar' is a halogenated phenyl group, R is a hydrocarbon residue having a functional group at the .alpha.-carbon, R.sup.3' is an optionally substituted aliphatic or aromatic hydrocarbon residue or an optionally substituted aromatic heterocyclic group, Y and Z are, the same or different, a nitrogen atom or a methine group optionally substituted with a lower alkyl group, and (R) and (S) represent configurations, which is an optically active intermediate for production of optically active triazole compounds (I): ##STR2## wherein the symbols have the same meanings as defined above, and methods of preparing the compounds (V) and (I).Type: GrantFiled: May 30, 1995Date of Patent: October 14, 1997Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Akihiro Tasaka, Hiroshi Hosono
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Patent number: 5545652Abstract: The present invention provides an azole compound represented by the formula (I): ##STR1## wherein Ar is an optionally-substituted phenyl group; R.sup.1 and R.sup.2 are, the same or different, a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; R.sup.3 is a hydrogen atom or an acyl group; Y is a nitrogen atom or a methine group; and A is an optionally-substituted saturated cyclic amide group bonded through a first nitrogen atom, or a salt thereof, which is useful for prevention and therapy of fungal infections of mammals as antifungal agent.Type: GrantFiled: September 23, 1994Date of Patent: August 13, 1996Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Akihiro Tasaka
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Patent number: 5495024Abstract: An optically active azole compound of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom, a halogen atom, a haloalkyl group, a haloalkoxy group or an optionally substituted nitrogen-containing heterocyclic group; R.sup.3 is a hydrogen atom or an acyl group; Q is CH or N; ##STR2## is a nitrogen-containing aromatic five-membered heterocyclic group having at least two adjacent nitrogen atoms as the ring-constituting atoms which may be substituted, or an aromatic condensed heterocyclic group having two or more nitrogen atoms as the ring-constituting atoms which may be substituted; and (R) shows that the carbon atom marked with (R) has R-configuration; provided that either of R.sup.1 and R.sup.2 is an optionally substituted nitrogen-containing heterocyclic group when ##STR3## is an 1H-1,2,4-triazol-1-yl group, or a salt thereof, which is useful as an antifungal agent.Type: GrantFiled: September 8, 1994Date of Patent: February 27, 1996Assignee: Takeda Chemical Industries Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
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Patent number: 5466820Abstract: An azole compound represented by the formula (I): ##STR1## wherein Ar is a substituted phenyl group; R.sup.1 and R.sup.2 independently are a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; R.sup.3 is a group bonded through a carbon atom; R.sup.4 is a hydrogen atom or an acyl group; X is a nitrogen atom or a methine group; and Y and Z independently are a nitrogen atom or a methine group which may optionally be substituted with a lower alkyl group, or a salt thereof, which is useful for prevention and therapy of fungal infections of mammals as antifungal agent.Type: GrantFiled: August 19, 1994Date of Patent: November 14, 1995Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
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Patent number: 5405861Abstract: The novel 2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-2-propanol derivertives of the formula (I): ##STR1## wherein, R.sup.0, R.sup.1 and R.sup.2 are the same or different and represent a hydrogen atom or a lower alkyl group; A represents a formula: ##STR2## wherein, X stands for a chemical bond or a formula: ##STR3## (wherein, X' stands for a chemical bond or an alkylene group having 1 to 5 carbon atoms which may contain sulfur or oxygen atom as the constituent atoms, R.sup.5 and R.sup.6 are the same or different and stand for a hydrogen atom or a lower alkyl group), R.sup.3 stands for an aromatic heterocyclic group which may be substituted, n denotes 0, 1 or 2), and R.sup.4 stands for a hydrogen atom or an alkanoyl group, or a physiologically acceptable salt thereof have antifungal activities, and they are used for preventing or treating infectious diseases caused by fungi.Type: GrantFiled: April 22, 1994Date of Patent: April 11, 1995Assignee: Takeda Chemical Industries, Co., Ltd.Inventors: Katsumi Itoh, Kenji Okonogi
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Patent number: 5389663Abstract: An azole compound represented by the formula (I): ##STR1## wherein X is a nitrogen atom; Ar is a phenyl group substituted by halogen or a halogenated C.sub.1-4 alkyl group; R.sup.1 and R.sup.2 independently are a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; n denotes an integer of 0 to 2; and R.sup.7 is a hydrogen atom, a hydroxyl group which may be optionally acylated by an acyl group selected from acetyl, propionyl, butyryl, isobutyryl, phenylacetyl and benzoyl, or may form a bond together with R.sup.1 ; or a salt thereof.Type: GrantFiled: November 24, 1993Date of Patent: February 14, 1995Assignee: Takeda Chemical Industries, Ltd.Inventors: Katsumi Itoh, Kenji Okonogi, Akihiro Tasaka