Patents by Inventor Katsuaki Matsui
Katsuaki Matsui 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: 5768210Abstract: A semiconductor memory device according to the present invention comprise a plurality of arrays each supplied with a common column address signal. In an selected array, the potential of a data line is set to a potential corresponding to a potential supplied to a corresponding bit line in response to the potential of the bit line, the potential of the corresponding column address signal and the potential of a terminal. In non-selected array other than the selected array at this time, since the potential of a terminal in the non-selected array is set to a potential different from that of the terminal in the selected array, the potential of the data line remains unchanged irrespective of the column address signal.Type: GrantFiled: April 3, 1997Date of Patent: June 16, 1998Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Tamihiro Ishimura
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Patent number: 5699316Abstract: A semiconductor memory device according to the present invention comprise a plurality of arrays each supplied with a common column address signal. In an selected array, the potential of a data line is set to a potential corresponding to a potential supplied to a corresponding bit line in response to the potential of the bit line, the potential of the corresponding column address signal and the potential of a terminal. In non-selected array other than the selected array at this time, since the potential of a terminal in the non-selected array is set to a potential different from that of the terminal in the selected array, the potential of the data line remains unchanged irrespective of the column address signal.Type: GrantFiled: October 12, 1995Date of Patent: December 16, 1997Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Tamihiro Ishimura, Sampei Miyamoto
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Patent number: 5625315Abstract: A booster power generating circuit according to the present invention comprises first to fourth booster circuits for supplying first to fourth booster potentials to first to fourth nodes in response to first to fourth pulse signals, a first precharge circuit for precharging the first node when controlled by the fourth booster potential from the fourth node, a second precharge circuit for precharging the third node when controlled by the second booster potential from the second node and a first output circuit for outputting the first booster potential of the first node to an output node, whereby a given booster potential can be output since there is no voltage drop of the boosted potential of the second and fourth nodes, there is obtained high potential between the first and third precharge circuits and the precharging speed of the first and third node is not slowed.Type: GrantFiled: September 18, 1995Date of Patent: April 29, 1997Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Sampei Miyamoto, Hidekazu Kikuchi
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Patent number: 5502415Abstract: A booster power generating circuit according to the present invention comprises first to fourth booster circuits for supplying first to fourth booster potentials to first to fourth nodes in response to first to fourth pulse signals, a first precharge circuit for precharging the first node when controlled by the fourth booster potential from the fourth node, a second precharge circuit for precharging the third node when controlled by the second booster potential from the second node and a first output circuit for outputting the first booster potential of the first node to an output node, whereby a given booster potential can be output since there is no voltage drop of the boosted potential of the second and fourth nodes, there is obtained high potential between the first and third precharge circuits and the precharging speed of the first and third node is not slowed.Type: GrantFiled: June 29, 1994Date of Patent: March 26, 1996Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Sampei Miyamoto, Hidekazu Kikuchi
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Patent number: 5452260Abstract: A semiconductor memory circuit selects one memory cell group in response to an address signal having block selection information, first and second significant bit information. First, to third memory cell blocks respectively have memory cell groups each including memory cells. First, to third decoder groups respectively have first decoders each coupled to one memory cell group in the first memory cell block, second decoders each coupled to one memory cell group in the second memory cell block, and third decoders each coupled to one memory cell group in the third memory cell block. First and second logic circuits respectively output a first common block selection signal with respect to the first and second memory cell blocks in response to the block selection information of the address signal, and a second common block selection signal with respect to the second and third memory cell blocks in response to the block selection information of the address signal.Type: GrantFiled: March 21, 1994Date of Patent: September 19, 1995Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Sampei Miyamoto, Tamihiro Ishimura
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Patent number: 5363331Abstract: A semiconductor memory device has plural memory cell blocks, each including memory cells storing data therein. A data bus and switching circuits transfer data from the memory cells to the data bus in response to a first logic level signal applied thereto. Column lines each have first and second ends. Each column line is connected to the corresponding switching circuit in each of the memory cell blocks. A column decoder, coupled to the first end of the column lines, provides the first logic level signal to one of the column lines upon the memory cell blocks being accessed. Potential setting circuits are coupled to the second end of the column lines, and preliminarily set the respective column lines to be in a predetermined potential so that each switching circuit is inactive prior to the column decoder providing the first logic level signal. All the memory cells in an array can be prevented from becoming inoperative even if a column line is broken.Type: GrantFiled: December 22, 1992Date of Patent: November 8, 1994Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Sampei Miyamoto
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Patent number: 5297105Abstract: A semiconductor memory circuit selects one memory cell group in response to an address signal having block selection information, first and second significant bit information. First to third memory cell blocks respectively have memory cell groups each including memory cells. First to third decoder groups respectively have first decoders each coupled to one memory cell group in the first memory cell block, second decoders each coupled to one memory cell group in the second memory cell block, and third decoders each coupled to one memory cell group in the third memory cell block. First and second logic circuits respectively output a first common block selection signal with respect to the first and second memory cell blocks in response to the block selection information of the address signal, and a second common block selection signal with respect to the second and third memory cell blocks in response to the block selection information of the address signal.Type: GrantFiled: March 12, 1993Date of Patent: March 22, 1994Assignee: Oki Electric Industry Co., Ltd.Inventors: Katsuaki Matsui, Sampei Miyamoto, Tamihiro Ishimura
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Patent number: 4950031Abstract: An automobile rear underbody structure which comprises generally elongated side frames extending in a direction lengthwise of an automobile body structure and each having a front and rear frame portions. The rear frame portion of each side frame lies in a level offset upwardly relative to the front frame portion. The rear frame portion has a depressed zone defined at a predetermined position thereof to permit the rear frame portion to bend downwardly when an external impact greater than a predetermined value is applied thereto.Type: GrantFiled: June 29, 1988Date of Patent: August 21, 1990Assignee: Mazda Motor CorporationInventors: Sumiaki Mizunaga, Katsuaki Matsui, Hiroaki Kodama, Makoto Tokuda, Morikazu Sakamoto
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Patent number: 4241208Abstract: Piperidine derivatives having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;X represents oxygen or sulfur;Y represents oxygen, sulfur or a group of the formula .dbd.N--R" in which R" is hydrogen or alkyl;Z represents oxygen or a group of the formula >N--R'" in which R'" is hydrogen or alkyl;n is an integer of 1 to 4; andR represents, when n is 1, alkyl, aryl, cycloalkyl, alkoxycarbonyl, substituted phosphino or substituted phosphinyl, when n is 2, alkylene, alkenylene, arylene, aralkylene; alkylenediphenylene, bis-(alkoxycarbonyl) alkylene, alkylene-bis-(oxycarbonylalkyl), dialkylene ether or diphenylene ether, when n is 3, alkanetriyl,tris-(alkoxycarbonyl)alkanetriyl, alkanetriyl-tris-(oxycarbonylalkyl) or a group of the formula ##STR2## in which p is an integer of 1 through 8 inclusive, and, when n is 4, alkanetetrayl,tetrakis-(alkoxycarbonyl) alkanetetrayl or alkanetetrayl-tetrakis-(oxycarbonylalkyl).Type: GrantFiled: December 12, 1978Date of Patent: December 23, 1980Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 4212974Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: July 14, 1978Date of Patent: July 15, 1980Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4125533Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: December 23, 1976Date of Patent: November 14, 1978Assignee: Sankyo Co. Ltd.Inventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4066615Abstract: A synthetic polymer composition stabilized against photo- and thermal-deterioration comprising a stabilizing amount of a compound having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;X represents oxygen or sulfur;Y represents oxygen, sulfur or a group of the formula = N - R" in which R" is hydrogen or alkyl;Z represents oxygen or a group of the formula >N - R'" in which R'" is hydrogen or alkyl;N is an integer of 1 to 4; andR represents, when n is 1, alkyl, aryl, cycloalkyl, alkoxycarbonyl, substituted phosphino or substituted phosphinyl, when n is 2, alkylene, alkenylene, arylene, aralkylene; alkylenediphenylene, bis-(carboxycarbonyl) alkylene, alkylene-bis-(oxycarbonylalkyl), dialkylene ether or diphenylene ether, when n is 3, alkanetriyl, tris-(alkoxycarbonyl)alkanetriyl, alkanetriyl-tris-(oxycarbonylalkyl) or a group of the formula ##STR2## in which p is an integer of 1 through 8 inclusive, and, when n is 4, alkanetetrayl,tetrakis-(alkoxycarbType: GrantFiled: April 11, 1975Date of Patent: January 3, 1978Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 4016168Abstract: A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.Type: GrantFiled: February 26, 1975Date of Patent: April 5, 1977Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4007158Abstract: Novel piperidine derivatives of formula: ##STR1## (wherein 2 or 3 of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent alkyl groups having from 1 to 4 carbon atoms and the remainder of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen atoms, and R.sub.6 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, a substituted alkyl group, an aliphatic acyl group, an alkoxycarbonyl group or an aralkoxycarbonyl group) are useful as stabilizers for synthetic polymers.Type: GrantFiled: July 3, 1974Date of Patent: February 8, 1977Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Osawa
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Patent number: 4005094Abstract: Piperidine-spiro-hydrantoin derivatives having the formula ##STR1## wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive; andR represents, when n is 1, an alkenyl group which may be substituted with halogen, an alkynyl group which may be substituted with phenyl, an aralkyl group which may be substituted with halogen, alkyl of 1 to 4 carbon atoms or halomethyl, a hydroxyalkyl group, an alkoxyalkyl group, an alkenyloxyalkyl group, an acryloxyalkyl group, an alkylthioalkyl group, an acyloxyalkyl group, an epoxyalkyl group, an N-alkyl-substituted aminoalkyl group, an alkoxycarbonylalkyl group, an aryloxycarbonylalkyl group, an aliphatic acyl group, an alkoxycarbonyl group, a phosphino group which is substituted with phenoxy or alkoxy or a phosphinyl group which is substituted with phenoxy or alkoxy,When n is 2, an alkenylene group of 4 to 18 carbon atoms, a dialkyleneether group, an aralkylene group, a bis(acyloxyalkylene) group or an alkylene-bis(oxycarbonylalkyl) group,When n isType: GrantFiled: January 10, 1975Date of Patent: January 25, 1977Assignee: Sankyo Company LimitedInventors: Keisuku Murayama, Syoji Moriyama, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohata, Hisayou Ohsawa
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Patent number: 3975462Abstract: Piperidine-spiro-hydantoin derivatives having the formula ##SPC1##Wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive, and R represents various aliphatic or aromatic groups depending on the value of n.These compounds (I) are useful as stabilizers against photo and thermal deterioration of various synthetic polymers and can be prepared, for example, by reacting the corresponding 3-unsubstituted piperidine-spiro-hydantoin compound with the halide R-(X.sub.1).sub.n in which R and n are as defined herein and X.sub.1 is a halogen atom.Type: GrantFiled: October 22, 1974Date of Patent: August 17, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayou Ohsawa
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Patent number: 3941744Abstract: Piperidine derivatives having the formula ##SPC1##WhereinR' represents an alkyl group, a substituted alkyl group, an acyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, an amino group, a substituted amino group, or nitroso group;X represents oxygen atom or sulfur atom;Y represents oxygen atom, sulfur atom or a group of the formula = N -- R" in which R" is hydrogen atom, an alkyl group or a substituted alkyl group;Z represents oxygen atom or a group of the formula >N -- R'" in which R'" is hydrogen atom, an alkyl group or a substituted alkyl group;n is an integer of 1 through 4 inclusive; andR represents, when n is 1, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, a cycloalkyl group, an alkoxycarbonyl group, a substituted alkoxycarbonyl group, a substituted phosphino group or a substituted phosphinyl group, when n is 2, an alkylene group, an alkenylene group, an arylene group, a substituted arylene group, an aralkylene group; an alkylenediphenylene gType: GrantFiled: March 12, 1973Date of Patent: March 2, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Syoji Morimura, Takao Yoshioka, Toshimasa Toda, Eiko Mori, Hideo Horiuchi, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohata, Hisayou Ohsawa
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Patent number: 3940401Abstract: 4-Piperidone ketal derivatives of the formulae ##SPC1##And ##SPC2##Wherein R.sub.1 represents an alkyl group of 1 to 8 carbon atoms and R.sub.2 represents an alkylene group of 2 or 3 carbon atoms or o-phenylene group and they are prepared by reacting triacetonamine with a monohydric alcohol of the formulaR.sub.1 --OH (III)wherein R.sub.1 is as defined above or a dihydric alcohol or phenol of the formulaR.sub.2 --(OH).sub.2 (IV)wherein R.sub.2 is as defined above in the presence of an acid catalyst. They are useful as statilizers against deterioration of synthetic polymers.Type: GrantFiled: July 24, 1974Date of Patent: February 24, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Toshimasa Toda, Eiko Mori, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Onta, Ichiro Watanabe
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Patent number: 3933735Abstract: 4-Piperidone derivatives having the formulae ##SPC1##Wherein R represents a phenyl or naphthyl group which may be substituted with nitro, lower alkyl, halogen, hydroxyl, lower alkyl hydroxy, hydroxy lower alkyl or formyl or a 5- or 6-membered heterocyclic group having as a hetero atom at least one of oxygen atom, sulfur atom and nitrogen atom and R.sub.1 represents hydrogen atom or an alkyl group of 1 to 4 carbon atoms. They are useful as stabilizers for various synthetic polymers against their photo- and thermal-deteriorations and the 4-piperidone derivatives (II) are prepared from the corresponding 2,2,6,6-tetramethyl-4-oxopiperidine derivatives by reaction with an aldehyde and the 4-piperidone derivatives (I) are prepared from the 4-piperidone derivatives (II) through dehydration.Type: GrantFiled: May 15, 1974Date of Patent: January 20, 1976Assignee: Sankyo Company LimitedInventors: Keisuke Murayama, Susumu Higashida, Katsuaki Matsui, Tomoyuki Kurumada, Noriyuki Ohta, Hisayu Ohsawa