Patents by Inventor Atsushi Ohba

Atsushi Ohba 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).

  • Patent number: 6870771
    Abstract: In a memory block that is to be subjected to an erasure operation, voltage of the ground level is selectively supplied to only one word line. By applying an erasure pulse to a source line, memory cell transistors have their threshold voltages shifted. As to another word line, a pulse of a positive voltage is supplied in synchronization to the application of an erasure pulse to the source line. Another group of memory cell transistors do not have their threshold voltages shifted.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: March 22, 2005
    Assignees: Renesas Technology Corp., Mitsubishi Electric Engineering Company Limited
    Inventors: Mitsuhiro Tomoeda, Atsushi Ohba, Toshimasa Makino
  • Publication number: 20040264262
    Abstract: A memory mat is provided separately from a memory mat that is a normal memory area, and data therein cannot be read from the outside. In a page buffer, information input from the outside is stored. A comparing circuit compares security information stored in memory mat with information stored in page buffer, and the comparison result is output to the outside as a status. Even when unauthorized copying is performed, information in memory mat is not copied. Therefore, an external apparatus can easily determine whether or not the semiconductor memory is an unauthorized copy by referring to the status.
    Type: Application
    Filed: June 23, 2004
    Publication date: December 30, 2004
    Applicant: RENESAS TECHNOLOGY CORP.
    Inventors: Shinichi Ishimoto, Yoshikazu Miyawaki, Shinji Kawai, Atsushi Ohba
  • Publication number: 20040161284
    Abstract: In a stick type cosmetic material feeding container 1, a stick type cosmetic material A retained at a front end of a core chuck member 30 moves in an axial direction in a front cylinder 10 by a feeding mechanism due to rotary operation of the front cylinder 10 and a base cylinder 20. A cylindrical body 34 which defines the advance limit and retreat limit of a feeding stroke is installed at a rear part of the core chuck member 30. Elastic engagement projections 37 which are spirally engaged with a roulette-shaped spiral 22 of the base cylinder 20 and have elasticity are installed at an outer circumference of the cylindrical body 34. Further, the cylindrical body 34 is provided with an elastic slit 34c for absorbing a shock in an axial direction.
    Type: Application
    Filed: June 27, 2003
    Publication date: August 19, 2004
    Inventors: Atsushi Ohba, Tadasuke Adachi
  • Publication number: 20040151529
    Abstract: A front cylinder 10 and a base body 20 which is rotatably connected with the front cylinder 10 are provided, and due to relative rotations of the front cylinder 10 and the base body 20 , a stick type cosmetic material A retained by a core chuck member 30 slides forward and backward along a through hole 13 which extends in an axial direction in the front cylinder. A plurality of first slide grooves 12a are formed along an inner circumference of the through hole 13 having an inside diameter almost equal to an outside diameter of the stick type cosmetic material A and extend in an axial direction. Also, a plurality of second grooves 12b are located at ends of the first slide grooves 12a and formed continuously from the ends. The second grooves are deeper than the first slide grooves 12a. A plurality of claws 32 are formed at a front end section of the core chuck member 30 so as to retain the stick type cosmetic material A and slidably guided by the first slide grooves 12a and the second slide grooves 12b.
    Type: Application
    Filed: June 4, 2003
    Publication date: August 5, 2004
    Inventor: Atsushi Ohba
  • Patent number: 6769826
    Abstract: A stick type cosmetic material feeding container which houses a stick type cosmetic material in such a manner that the stick type cosmetic material can be fed out prevents a spiral engagement mechanism from breaking at the uppermost limit or the like. The stick type cosmetic material feeding container further eliminates unsteadiness of the spiral engagement mechanism and can obtain the stress of slide due to the spiral engagement mechanism. A front cylinder 10 having a tip opening hole 11 through which a stick type cosmetic material advances and retreats is rotatably connected with a container body 3. A core chuck member 30 having a spiral section 34 is inserted in the container body 3 and a rotation regulating mechanism for synchronously rotating the front cylinder 10 and the core chuck member 30 is provided. Further, an elastic engagement section 68 is provided in a through hole 61 of an elastic cylindrical body 60 which rotates synchronously with the container body 3.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: August 3, 2004
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Publication number: 20040148457
    Abstract: A semiconductor memory device including a flash memory and a RAM incorporating a pseudo-SRAM contained in an MCP, has an internal transfer control signal for controlling internal data transfer between the flash memory and pseudo-SRAM, and an external transfer control signal for controlling data transfer between an external CPU and pseudo-SRAM, as control signals for the pseudo-SRAM. A flash controller in the RAM controls the internal transfer control signal so as to suspend the internal data transfer between the flash memory and pseudo-SRAM when the external CPU requests access to the pseudo-SRAM during the internal data transfer.
    Type: Application
    Filed: September 5, 2003
    Publication date: July 29, 2004
    Inventors: Norihiko Hakushi, Atsushi Ohba, Yoshimasa Yoshimura, Takeshi Nakayama
  • Patent number: 6611468
    Abstract: In a non-volatile semiconductor memory device, a constant current circuit is arranged in parallel with an NMOS diode converting a detected current on the array cell side to a voltage, and a constant current circuit is arranged in parallel with an NMOS diode converting a detected current on the reference cell side to a voltage. Constant current circuits supply an offset current. Thus, a difference between two input voltages of a differential amplifier increases.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: August 26, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Isao Nojiri, Atsushi Ohba, Yoshihide Kai
  • Patent number: 6588957
    Abstract: A cartridge type stick-shaped cosmetic material feeding container 1 comprises a cartridge 2 and a container body 3, and the cartridge 2 rotatably connects a base cylinder 20 and a front cylinder 10 having an opening hole 11 through which a stick-shaped cosmetic material A advances and retreats. The stick-shaped cosmetic material A is retained by claws 32 at a front end of a core chuck member 30 inserted and an O-ring 4 is wound to an outer circumference of the base cylinder 20. Due to a feeding mechanism in the cartridge 2, the stick-shaped cosmetic material A retained by the core chuck member 30 advances and retreats along the front cylinder 10 with rotations of the front cylinder 10 and the base cylinder 20. The feeding mechanism of the cartridge 2 inserted in the container body 3 functions when the base cylinder 20 and the container body 3 synchronously rotate by frictional resistance of an inner circumference of the container body and the O-ring 4 wound to the base cylinder 20.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: July 8, 2003
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6567316
    Abstract: Operations of applying an erase pulse and further performing block program before erasure are executed in steps S2 and S3 before applying the erase pulse on a block by block basis. This narrows the distribution width of the threshold voltage, and reduces the number of the memory transistors to be subjected to over-erase verify so that a total erasing time of data of a flash memory can be reduced.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: May 20, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Ohba, Satoshi Shimizu, Yoshikazu Miyawaki
  • Patent number: 6557563
    Abstract: A spiral groove 11 is provided in a front cylinder 10, and a spiral piece 32 for constituting a cosmetic material retaining section 31 provided at a tip of a push rod 30 is located in the spiral groove 11 and retains a stick type cosmetic material A. A spiral engagement section 33 subsequent to the spiral piece 32 is engaged with the spiral groove 11 and constitutes a spiral engagement mechanism. An engagement line section 34 provided at an outer circumference of a stopper section 38 of the push rod 30 is engaged with a rotary stop groove 21 of a container body 20 and constitutes a rotary stop mechanism.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: May 6, 2003
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6543952
    Abstract: There are provided a cosmetic container for housing a stick type cosmetic material in such a manner that the cosmetic material can be fed and a cartridge for the cosmetic container which can easily be manufactured or assembled at a low cost, have considerable flexibility in design and are applicable to stick type cosmetic materials having various diameters and hardness. A cylindrical body 20 is housed in a lower part 13 of a front cylinder 10 which is rotatably housed in a container body 2 and a rod 30 is incorporated extending over an inside of the cylindrical body 20 and a cosmetic material housing section 11A of an upper part 11 of the front cylinder 10, whereby a cartridge 1 is constituted.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: April 8, 2003
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6543458
    Abstract: A cosmetic container serves both as a container for containing a liquid cosmetic and a stick type cosmetic material container for housing a stick type cosmetic material in such a manner that the stick type cosmetic material can be fed out. Thus, a container body in which a liquid cosmetic is filled is spirally engaged with a junction tool which freely opens and closes the container body. A stick type pivot which is inserted in the container body and has an applicator is fixed to the junction tool. A front cylinder is rotatably connected to the junction tool. A feeding mechanism for moving in an axial direction a rod, which retains the stick type cosmetic material to be slidably inserted in the front cylinder, by rotations of the junction tool and the front cylinder is provided.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: April 8, 2003
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Publication number: 20030053843
    Abstract: A cartridge type stick-shaped cosmetic material feeding container 1 comprises a cartridge 2 and a container body 3, and the cartridge 2 rotatably connects a base cylinder 20 and a front cylinder 10 having an opening hole 11 through which a stick-shaped cosmetic material A advances and retreats. The stick-shaped cosmetic material A is retained by claws 32 at a front end of a core chuck member 30 inserted and an O-ring 4 is wound to an outer circumference of the base cylinder 20. Due to a feeding mechanism in the cartridge 2, the stick-shaped cosmetic material A retained by the core chuck member 30 advances and retreats along the front cylinder 10 with rotations of the front cylinder 10 and the base cylinder 20. The feeding mechanism of the cartridge 2 inserted in the container body 3 functions when the base cylinder 20 and the container body 3 synchronously rotate by frictional resistance of an inner circumference of the container body and the O-ring 4 wound to the base cylinder 20.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 20, 2003
    Inventor: Atsushi Ohba
  • Publication number: 20030043629
    Abstract: In a memory block that is to be subjected to an erasure operation, voltage of the ground level is selectively supplied to only one word line. By applying an erasure pulse to a source line, memory cell transistors have their threshold voltages shifted. As to another word line, a pulse of a positive voltage is supplied in synchronization to the application of an erasure pulse to the source line. Another group of memory cell transistors do not have their threshold voltages shifted.
    Type: Application
    Filed: July 24, 2002
    Publication date: March 6, 2003
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuhiro Tomoeda, Atsushi Ohba, Toshimasa Makino
  • Publication number: 20030031497
    Abstract: A stick type cosmetic material feeding container which houses a stick type cosmetic material in such a manner that the stick type cosmetic material can be fed out prevents a spiral engagement mechanism from breaking at the uppermost limit or the like. The stick type cosmetic material feeding container further eliminates unsteadiness of the spiral engagement mechanism and can obtain the stress of slide due to the spiral engagement mechanism. A front cylinder 10 having a tip opening hole 11 through which a stick type cosmetic material advances and retreats is rotatably connected with a container body 3. A core chuck member 30 having a spiral section 34 is inserted in the container body 3 and a rotation regulating mechanism for synchronously rotating the front cylinder 10 and the core chuck member 30 is provided. Further, an elastic engagement section 68 is provided in a through hole 61 of an elastic cylindrical body 60 which rotates synchronously with the container body 3.
    Type: Application
    Filed: August 20, 2002
    Publication date: February 13, 2003
    Inventor: Atsushi Ohba
  • Patent number: 6515908
    Abstract: Erasing is performed two times for narrowing a distribution width of threshold voltages of memory cells, and reducing the number of memory transistors to be subjected to over-erase verify. The erase verify voltage for the first erasing is set more strictly than the erase verify voltage for the second erasing. The erase pulses for the second erasing can be reduced in number, and the erasing time can be further reduced.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: February 4, 2003
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Engineering Company Limited
    Inventors: Yoshikazu Miyawaki, Satoshi Shimizu, Atsushi Ohba, Mitsuhiro Tomoeda
  • Patent number: 6504761
    Abstract: In the non-volatile semiconductor memory device, for a current mirror for reading out data of a memory cell, a diode-connected transistor and a cut transistor are provided. The diode-connected transistor makes a precharged voltage level lower than a power supply voltage level. The cut transistor reduces current consumption.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: January 7, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihide Kai, Atsushi Ohba, Isao Nojiri
  • Patent number: 6503487
    Abstract: A container for liquid cosmetics having an aperture controlling ring that is restricted to 360 degrees or less by a convex piece of the aperture controlling ring and a rotation prevention piece of the bottle. A through hole is provided in the aperture controlling ring to allow a user to know the quantity of liquid cosmetics adhered to a stick-shaped applicator which is fixed to a cap, due to variable indicators provided at a container body. The container also prevents volatilization of the liquid cosmetics therein.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: January 7, 2003
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6473345
    Abstract: At the time of writing data, a tester outputs a chip enable signal /CE of the L level and selection signals of the L level to simultaneously make semiconductor memory devices active. At the time of reading data, the tester outputs the chip enable signal of the L level to the semiconductor memory devices, and selectively switches the logic level of a selection signal to be outputted to some semiconductor memory devices and that of the selection signal to be outputted to the other semiconductor memory devices to the L level. In such a manner, a number of semiconductor memory devices can be tested without increasing the number of pins of the tester.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: October 29, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Hayasaka, Yoshikazu Miyawaki, Atsushi Ohba
  • Patent number: 6473343
    Abstract: A signal amplification circuit according to the present invention includes a current comparison part for generating a voltage in accordance with the difference between the reference current and the memory cell current at the first node and an output level setting part for generating an output signal,at the second node. The output level setting part has the first transistor for supplying a constant current in accordance with the control voltage from the power supply node to the second node and the second transistor for allowing the current in accordance with the voltage of the node to flow from the second node to the ground node. The current which flows through the second transistor is designed to be in balance with the constant current under the condition where the reference current and the memory cell current are in balance.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: October 29, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Ohba, Isao Nojiri, Yoshihide Kai