# Ohkuma, Kanagawa

## Hiroaki Ohkuma, Kanagawa JP

Patent application number | Description | Published |
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20110013943 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes a first chamber, a second chamber, a first inlet portion, a first carrying member and an auxiliary blade. The first chamber receives a developer supplied to a developer holder. The second chamber receives the developer carried from the first chamber after being circulated between the first chamber and the second chamber. The first inlet portion allows the developer to be introduced from the second chamber to the first chamber. The first carrying member is disposed in the first chamber to carry the developer in the first chamber in a first carrying direction. The first carrying member includes a rotating shaft, a spiral blade provided at an outer periphery of the rotating shaft, and the auxiliary blade formed toward an upstream side of the first carrying direction from the spiral blade. | 01-20-2011 |

## Kenji Ohkuma, Kanagawa JP

Patent application number | Description | Published |
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20100046741 | APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR DECRYPTING, AND APPARATUS, METHOD, AND COMPUTER PROGRAM PRODUCT FOR ENCRYPTING - An input unit inputs encrypted data that elements of a subgroup and expressed in an affine representation. A transforming unit transforms the inputted encrypted data into projective representation data expressed in a projective representation. A plain data calculating unit subjects the projective representation data to a decrypting process previously defined by a cryptosystem, thereby calculating plain data expressed in the projective representation. | 02-25-2010 |

20100046742 | APPARATUS AND COMPUTER PROGRAM PRODUCT FOR PERFORMING DATA COMPRESSION PROCESSING USING ALGEBRAIC TORUS - An encryption processing unit executes an arithmetic operation decided in advance and outputs an arithmetic result as an element on an algebraic torus. A compressing unit outputs, when the arithmetic result is an exceptional point representing an element on the algebraic torus that cannot be compressed by a compression map for compressing an element on the algebraic torus into affine representation, a compression result obtained by compressing the arithmetic result according to the compression map and outputs, when the arithmetic result is the exceptional point, an element belonging to a specific set decided in advance that does not overlap a set to which a compression result obtained by compressing the arithmetic result, which is not the exceptional point, belongs. | 02-25-2010 |

20100046743 | APPARATUS FOR PERFORMING DATA COMPRESSION PROCESSING USING ALGEBRAIC TORUS - A compressing unit compresses an element on an algebraic torus into affine representation according to a compression map. A determining unit determines whether a target element on the algebraic torus to be compressed is an exceptional point representing an element on the algebraic torus that cannot be compressed by the compression map. The compressing unit generates, when it is determined that the target element is the exceptional point, a processing result including exceptional information indicating that the target element is the exceptional point, and generates, when it is determined that the target element is not the exceptional point, a processing result including affine representation obtained by compressing the target element according to the compression map. | 02-25-2010 |

20100046745 | ENCRYPTING APPARATUS, DECRYPTING APPARATUS, CRYPTOCOMMUNICATION SYSTEM, AND METHODS AND COMPUTER PROGRAM PRODUCTS THEREFOR - A decrypting apparatus that decrypts encrypted data that has been encrypted first data containing plain data, the encrypted data being represented by using an affine representation F_{p̂m}×F_{p̂m}̂*(where p: a prime number; m: a natural number; and ̂: exponentiation) obtains encrypted data represented in a vector format and a secret key corresponding to a public key and judges whether a vector component contained in the encrypted data is the affine representation F_{p̂m}×F_{p̂m}̂*. Further, based on the result of the judging process, the decrypting apparatus maps the vector component onto each of the members of an algebraic torus by forming a decompression map and decrypts the encrypted data mapped onto each of the members of the algebraic torus, by using the secret key, therefore obtains the plain data. | 02-25-2010 |

20100046746 | PARAMETER GENERATING DEVICE AND CRYPTOGRAPHIC PROCESSING SYSTEM - A parameter generating device includes an input receiving unit that receives a degree n of an algebraic torus T including a group G in which a cryptosystem used in a torus-compressed public key cryptosystem is defined, a size W of a finite field F, and a size S of the group G, an extension-degree determining unit that determines an extension degree m of a finite field Fp | 02-25-2010 |

20100049777 | REPRESENTATION CONVERTING APPARATUS, ARITHMETIC APPARATUS, REPRESENTATION CONVERTING METHOD, AND COMPUTER PROGRAM PRODUCT - When converting an affine representation representing a 2r-th degree algebraic torus T | 02-25-2010 |

20100063986 | COMPUTING DEVICE, METHOD, AND COMPUTER PROGRAM PRODUCT - In a computing device that calculates a square of an element in a finite field, a vector representation of the element in the finite field is accepted. The vector representation includes a plurality of elements. The computing device performs a multiplication operation on a base field using the accepted elements, and obtains a multiplication value. The multiplication operation is determined by a condition under which the element in the finite field is placed in an algebraic torus. The computing device performs an addition and subtraction operation using the obtained multiplication value and the accepted elements, and obtains a calculation result of the square of the element. The addition and subtraction operation is determined by the condition. The computing device then outputs the calculation result. | 03-11-2010 |

20120124114 | ARITHMETIC DEVICE - According to one embodiment, a representation converting unit converts a set of n elements (h | 05-17-2012 |

20120239721 | ARITHMETIC DEVICE, METHOD, AND PROGRAM PRODUCT - An arithmetic device includes an input unit inputting data that are elements of a group; a converting unit is configured, when the input data are in a second representation, to convert the input data into a first representation and to perform arithmetic operation on the converted first representation using an operand in the first representation in which at least one subcomponent is a zero element to convert the converted first representation into first converted data expressed in the first representation, and when the input data are in the first representation, to perform arithmetic operation on the input data using the operand in the first representation in which at least one subcomponent is a zero element to convert the input data into second converted data expressed in the first representation; and an operating unit that performs arithmetic processing on the first or the second converted data using secret information. | 09-20-2012 |

20130218939 | EXPONENTIATION CALCULATION APPARATUS AND METHOD FOR CALCULATING SQUARE ROOT IN FINITE EXTENSION FIELD - In a computing device that calculates a square of an element in a finite field, a vector representation of the element in the finite field is accepted. The vector representation includes a plurality of elements. The computing device performs a multiplication operation on a base field using the accepted elements, and obtains a multiplication value. The multiplication operation is determined by a condition under which the element in the finite field is placed in an algebraic torus. The computing device performs an addition and subtraction operation using the obtained multiplication value and the accepted elements, and obtains a calculation result of the square of the element. The addition and subtraction operation is determined by the condition. The computing device then outputs the calculation result. | 08-22-2013 |

## Takashi Ohkuma, Kanagawa JP

Patent application number | Description | Published |
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20090190168 | DOCUMENT PROCESSING SYSTEM - A document processing system is disclosed that is capable of processing both fixed-format and unfixed-format hand written paper documents. The document processing system includes an encoding unit that encodes a sheet ID for identifying a hand written first document on a sheet to generate a coded sheet ID; a decoding unit that decodes the coded sheet ID; a document-sheet ID association unit that associates the sheet ID with a document ID assigned to a computerized second document; a printing unit that acquires the sheet ID and prints the coded sheet ID on the first document; a sheet ID management unit that manages the sheet ID; an information acquisition unit that acquires the sheet ID decoded by the decoding unit, and hand-written data from the first document on which the coded sheet ID is printed; and a process-sheet ID association unit that associates the sheet ID with a process ID of a process for processing the hand-written data acquired by the information acquisition unit. | 07-30-2009 |

20100045771 | INFORMATION RECORDING APPARATUS AND INFORMATION RECORDING METHOD - A disclosed information recording apparatus includes an erasing unit configured to erase prerecorded information on recording media capable of being colored and decolored by heat; a recording unit configured to record information on the recording media from which the prerecorded information is erased; and a control unit configured, when a recording request is received, to cause the recording unit to start recording information on a first one of the recording media and to cause the erasing unit to start erasing prerecorded information on a second one of the recording media. | 02-25-2010 |

## Yoshihito Ohkuma, Kanagawa JP

Patent application number | Description | Published |
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20130078859 | CONNECTOR AND METHOD OF MANUFACTURING SAME - A connector which permits the resistance against the deformation of a shield to be increased and a method of manufacturing the connector. The shield is made up of an inner shield member disposed on the inner surface side of the shield and anouter shield member disposed on the outer surface side and, therefore, the strength of the shield can be increased by the double structure of the shield members. As a result of this, the shield is not deformed easily even in the case where an excessive external force is applied to the shield in the vertical direction or in the horizontal direction, for example, in inserting and extracting a mating connector into and out of the shield. | 03-28-2013 |

20130130534 | CONNECTOR - A connector is configured such that parts of the connector bodies will be placed in openings of a substrate and that other parts of the connector bodies, i.e., parts placed on the substrate, will be equal in a height dimension to LEDs placed on the substrate. This makes it possible to reduce the overall thickness of the substrate including the connector bodies. Consequently, the substrate with the connectors mounted thereon can be installed without being restricted by substrate installation space even in a small device, which has a small substrate installation space in a thickness direction of the substrate. | 05-23-2013 |

20130157519 | CONNECTOR - A connector which can absorb thermal expansion and contraction of a substrate, or positional deviation of the substrate, and which enables the male and female connectors thereof to be fitted to each other where the male and female connectors are inclined to each other. A male terminal of a male connector, and a female terminal of a female connector are slidable relative to each other when in contact with each other. The male terminal and the female terminal are rotatable relative to each other about a contact point when in contact with each other, and hence the male terminal and the female terminal can be attached and detached to and from each other at an arbitrary rotating position. | 06-20-2013 |