Patents by Inventor Hirokazu Ozaki

Hirokazu Ozaki 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).

  • Publication number: 20050227172
    Abstract: A process for producing a photoresist composition which is capable of suppressing the occurrence of defects, and displays excellent foreign matter characteristics, and superior storage stability as a resist solution. This process involves passing a photoresist composition, comprising a resin component (A) that satisfies a condition (1) below, an acid generator component (B), and an organic solvent (C), through a first filter including a first filtration membrane that satisfies a condition (2) below. (1) The resin component (A) comprises a structural unit (a1) represented by a general formula (I) shown below, and a structural unit (a2) containing an acid dissociable, dissolution inhibiting group. (wherein, R represents a hydrogen atom or a methyl group, and m represents an integer from 1 to 3). (2) The first filtration membrane has a critical surface tension of at least 70 dyne/cm, and has not been subjected to charge modification.
    Type: Application
    Filed: April 5, 2005
    Publication date: October 13, 2005
    Inventors: Hirokazu Ozaki, Masaaki Muroi, Tsunehiro Watanabe, Shinya Narumi
  • Patent number: 6888841
    Abstract: A pipelined scheduling system allowing suppressed unfairness among inputs and reduced fixed delay time is disclosed. Virtual output queues (VOQs) for each input port corresponding to respective ones of the output ports are stored. The VOQs are equally divided into a plurality of groups. Scheduling modules each corresponding to the groups performs a scheduling operation at a single time slot in a round robin fashion such that each of the scheduling modules reserves output ports at a predetermined future time slot for forwarding requests from logical queues of a corresponding group based on a reservation status received from a previous scheduling module, and then transfers an updated reservation status to an adjacent scheduling module. A crossbar switch connects each of the input ports to a selected one of the output ports depending on the reservation status at each time slot.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: May 3, 2005
    Assignee: NEC Corporation
    Inventor: Hirokazu Ozaki
  • Publication number: 20020039364
    Abstract: A scheduler allowing high-speed scheduling scalable with the number of input and output ports of a crosspoint switch and suppressed unfairness among inputs is disclosed. The scheduler includes an M×M matrix of scheduling modules, each of which schedules packet forwarding connections from a corresponding input group of input ports to selected ones of a corresponding output group of output ports based on reservation information. A diagonal modulo pattorn is used to determine a set of M scheduling modules to avoid coming into collision with each other. Each determined scheduling module performs reservation of packet forwarding connections based on current reservation information and transfers updated reservation information in row and column directions of the M×M matrix.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 4, 2002
    Inventors: Satoshi Kamiya, Hirokazu Ozaki
  • Patent number: 5630139
    Abstract: An information processor includes a CPU, an EEPROM for storing a program for ordinary processing and program download control, and a RAM having a first program storage area for loading the program stored in the EEPROM and a second program storage area for storing a new downloaded program. In an idle time in the ordinary processing program, the CPU executes the download control program to download the new program from an external device into the second program storage area of the RAM and store the downloaded program in the EEPROM, while the CPU is reset after the storage of the program.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: May 13, 1997
    Assignee: NEC Corporation
    Inventor: Hirokazu Ozaki
  • Patent number: 5345438
    Abstract: In a transmission device which includes first and second sections each of which has a first package stage and a second package stage connected to the first package stage through a back board, the first package stages in the first and the second sections are connected to input lines given the same input signals, respectively. The first and the second sections are selectively operable as an active and a backup section and comprise fault detectors, signal distributors, and switch circuits connected to the signal distributors in the first package stages, respectively. Each of the switch circuits has a plurality of outgoing internal lines each of which is connected in common to a selected one of the outgoing internal lines of another switch circuit on the back board to be connected to one of the second package stages. A switch controller monitors only the fault detectors of the first package stages in the first and the second sections to detect a fault.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: September 6, 1994
    Assignee: NEC Corporation
    Inventor: Hirokazu Ozaki