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: 6450715
    Abstract: A push rod 50 is provided in a container body 4 and a cartridge 2 is attached to the container body 4 in such a manner that the cartridge 2 can be attached and detached. Due to rotations of the container body 4 and the cartridge 2, a feeding mechanism causes the push rod 50 in the container body 4 to spirally advance, pushes a core chuck member 20 in the cartridge 2, and causes a stick type cosmetic material retained at the core chuck member 20 to move forward and backward. The core chuck member 20 is always urged in a direction of retreat by a spring 3, and when the cartridge 2 is attached to the container body 4, the push rod 50 is pushed back by repulsion to an inside of the container body 4 so as to prevent the stick type cosmetic material from projecting out of the cartridge 2.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: September 17, 2002
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Publication number: 20020118576
    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: Application
    Filed: July 23, 2001
    Publication date: August 29, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Atsushi Ohba, Isao Nojiri, Yoshihide Kai
  • Publication number: 20020110021
    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: Application
    Filed: August 20, 2001
    Publication date: August 15, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihide Kai, Atsushi Ohba, Isao Nojiri
  • Patent number: 6433583
    Abstract: The switch circuit receives a first supply voltage and a second supply voltage different from each other; a control input receiving a control signal that may be switched between the first supply voltage and ground; a driving inverter stage supplied by the second supply voltage and defining the output of the circuit; a feedback inverter stage supplied by the second supply voltage and including a top transistor and a bottom transistor defining an intermediate node and having respective control terminals. The control terminal of the top transistor is connected to the output node, the control terminal of the bottom transistor is connected to the control input, and the intermediate node is connected to the input of the driving inverter stage. An activation element helps switching of the intermediate node from the second supply voltage to ground; current limiting transistors are arranged in the inverter stages to limit the current flowing during switching and to reduce the consumption of the circuit.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: August 13, 2002
    Assignees: STMicroelectronics S.r.l., Mitsubishi Electric Corporation
    Inventors: Rino Micheloni, Giovanni Campardo, Atsushi Ohba, Marcello Carrera
  • Publication number: 20020101775
    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: Application
    Filed: August 20, 2001
    Publication date: August 1, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Isao Nojiri, Atsushi Ohba, Yoshihide Kai
  • Publication number: 20020097611
    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: Application
    Filed: July 23, 2001
    Publication date: July 25, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Hayasaka, Yoshikazu Miyawaki, Atsushi Ohba
  • Publication number: 20020057599
    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: Application
    Filed: May 1, 2001
    Publication date: May 16, 2002
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshikazu Miyawaki, Satoshi Shimizu, Atsushi Ohba, Mitsuhiro Tomoeda
  • Publication number: 20020053352
    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: Application
    Filed: May 4, 2001
    Publication date: May 9, 2002
    Inventor: Atsushi Ohba
  • Patent number: 6356481
    Abstract: The row decoder includes, for each word line of the memory, a respective biasing circuit receiving at the input a row selection signal switching, in preset operating conditions, between a supply voltage and a ground voltage and supplying at the output a biasing signal for the respective word line switching between a first operating voltage, in turn switching at least between the supply voltage and a programming voltage higher than the supply voltage, and a second operating voltage, in turn switching at least between the ground voltage and an erase voltage lower than the ground voltage. Each biasing circuit includes a level translator circuit receiving at the input the row selection signal and supplying as output a control signal switching between the first and the second operating voltages and an output driver circuit receiving as input the control signal and supplying at the output the biasing signal.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: March 12, 2002
    Assignees: STMicroelectronics S.r.l., Mitsubishi Electric Corporation
    Inventors: Rino Micheloni, Giovanni Campardo, Atsushi Ohba, Marcello Carrera
  • Publication number: 20020009324
    Abstract: A push rod 50 is provided in a container body 4 and a cartridge 2 is attached to the container body 4 in such a manner that the cartridge 2 can be attached and detached. Due to rotations of the container body 4 and the cartridge 2, a feeding mechanism causes the push rod 50 in the container body 4 to spirally advance, pushes a core chuck member 20 in the cartridge 2, and causes a stick type cosmetic material retained at the core chuck member 20 to move forward and backward. The core chuck member 20 is always urged in a direction of retreat by a spring 3, and when the cartridge 2 is attached to the container body 4, the push rod 50 is pushed back by repulsion to an inside of the container body 4 so as to prevent the stick type cosmetic material from projecting out of the cartridge 2.
    Type: Application
    Filed: May 17, 2001
    Publication date: January 24, 2002
    Inventor: Atsushi Ohba
  • Patent number: 6334729
    Abstract: At least a part of a cylindrical body (20) is rotatably and unslidably housed in a front cylinder (10). A beam (30) for retaining a stick type cosmetic material (4) on the upper end side is made unrotatable and slidable to the front cylinder (10) by a sliding mechanism and made feedable by a rotation together with the cylindrical body (20) by a feeding mechanism. The beam (30) is always urged downward by a return spring (6). It is arranged such that a lower end part of the cylindrical body (20) is at the same level as that of a lower end part of the front cylinder (10) and a synchronous engagement section (26) formed on an inner circumferential surface of a lower end part of the cylindrical body (20) is synchronously engaged with a synchronous engagement shaft 43 provided at a bottom (42) of a container body (2). An O-ring (5) is installed between the front cylinder (10) and the container body (2).
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: January 1, 2002
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6331084
    Abstract: A container for feeding a stick type cosmetic material which can reduce the number of parts employed therein and can easily be assembled is provided. The container for feeding a stick type cosmetic material 1 comprises a chuck 41 for retaining a stick type cosmetic material 3, a front cylinder 11, a push rod 47 having external-thread-shaped projections 49 on its outside surface, and a body cylinder 15 which has internal threads 63 to be spirally engaged with the external-thread-shaped projections 49. Unevennesses 49a having the same sections are formed on a peripheral surface of the external-thread-shaped projections 49 of the push rod 47 in an axial direction. On an inside surface of the front cylinder, synchronous engagement grooves 31 which are engaged with the unevennesses 49a and synchronously engage the push rod 47 and the front cylinder 11 are formed.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: December 18, 2001
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6330192
    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: October 2, 2000
    Date of Patent: December 11, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Ohba, Satoshi Shimizu, Yoshikazu Miyawaki
  • Patent number: 6309121
    Abstract: A stick type cosmetic material feeding container for retaining a stick type cosmetic material using claws, which prevents deformation of the claws, retains the stick type cosmetic material stably and properly. By forming sliding projections 36 or sliding convex lines 39 on outer circumferential surfaces 38 of the claws 32 which constitute a cosmetic material retaining section 31, the sliding projections 36 or the sliding convex lines 39 are always in contact with sliding contact surfaces 14 of sliding grooves 13. Or, by forming sliding convex lines 51 on the sliding contact surfaces 14 covering at least stroke range of the claws 32, the sliding convex lines 51 and the outer circumferential surfaces 38 of the claws 32 are always in contact with each other.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: October 30, 2001
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6293719
    Abstract: A cartridge type container for feeding a stick type cosmetic material includes a cartridge 2 having a stick type cosmetic material built-in, a container body 4 which can easily be attached to or detached from the cartridge 2, and a cap 3 which is composed of a cylinder 37 and a lid 31. The cylinder 37 is attached to a periphery of the container body 4 in such a manner that the cylinder 37 can slide in an axial direction and never comes off. The lid 31 is installed in such a manner that it can open and close an upper end opening of the cylinder 37. Further, the stick type cosmetic material can be advanced and returned by synchronously rotating the container body 4 and the cylinder 37.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: September 25, 2001
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6270273
    Abstract: A liquid cosmetic container which has a secure mechanism for defining the limit of the aperture regulation of a remover 13 is provided. In addition, the degree of aperture of the remover 13 is not influenced by the operation of putting or removing a cap 3. The liquid cosmetic container is provided with the cap 3, and an aperture-regulating ring 7 engages with an upper outer face of a container main body 19. A neck 5 which has an aperture regulating section 11 on the rear end moves in an axial direction in response to rotations of the aperture-regulating ring 7, thereby varying the diameter of a central aperture 119 of the remover 13. Furthermore a rotation-limiting piece 103 extends from a lower end of the aperture-regulating ring 7 and a rotation-limiting projection 136 is provided on an outer face of the container main body 19 which is under an engaging surface of the aperture-regulating ring 7.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: August 7, 2001
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: 6144584
    Abstract: Source line select transistors are provided corresponding to word lines. The source line select transistors are turned on in response to signal voltages on the corresponding word lines to connect a main source line to corresponding sub-source lines. The sub-source lines are arranged corresponding to sets of word lines. Programming/erasing are performed by using channel hot electrons and a Fowler-Nordheim current, by applying voltages to the word lines and the bit lines such that an excessive voltage may not be transmitted from the main source line to the sub-source line. Memory cell data can be precisely read out without an influence by a leak current of an over-erased or over-programmed memory cell.
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: November 7, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuichi Kunori, Atsushi Ohba
  • Patent number: 6069518
    Abstract: In response to complementary clock signals provided from a driver, a charge pump operates to provide an output voltage which is a down-converted negative voltage. The voltage between this output voltage and a predetermined positive reference voltage is capacitance-divided by capacitors. The capacitance-divided positive voltage is applied to a comparator, whereby a reference voltage is compared with the above positive voltage. An output signal of the comparator is applied to the driver. In response, the driver controls the operation of the charge pump, whereby the output voltage is clamped at a predetermined voltage level for output.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: May 30, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroaki Nakai, Shinichi Kobayashi, Motoharu Ishii, Atsushi Ohba, Tomoshi Futatsuya, Akira Hosogane
  • Patent number: 6048122
    Abstract: In a container for feeding a stick type cosmetic material which houses the stick type cosmetic material in such a manner that the material can be fed, a cylinder (9) is unrotatably housed in a main body of the container (3) and also a plurality of projections (7) provided at an outer circumference of a push rod (6) are engaged with spiral grooves (11) provided at an inner circumference of the cylinder (9). A cosmetic material (5) is held by a plurality of claws (4a) which are provided at a front end of the push rod (6). Projections (7a) which have advanced upward and got out of the cylinder (9) are engaged with grooves (8) in which the claws (4a) slide and a whirl of a front cylinder (2) and the push rod (6) is stopped. A stopper (10) is provided at a lower end of the push rod (6).
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: April 11, 2000
    Assignee: Suzuno Kasei Kabushiki Kaisha
    Inventor: Atsushi Ohba
  • Patent number: RE36655
    Abstract: An NAND gate for outputting an output establishment detection signal in response to the fact that a complementary output of a latch type sense amplifier has been established is provided. When a tristate buffer is activated by signal, a word line which has been in a selected state is rendered non-selected state. Accordingly, current can be prevented from leaking from a power supply line to a ground line in tristate buffer. In addition, column current Ic flowing through memory cells can be minimized in response to the fact that word line has been set to a selected state.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: April 11, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kunihiko Kozaru, Atsushi Ohba