Patents by Inventor Masaharu Ishii

Masaharu Ishii 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: 6311143
    Abstract: With respect to input data having the spread of errors or the like, “a suiting method” is to obtain a suiting function, which exist within a region of this spread, and which is highly robust. A suiting region (between an upper bound function M+(xi) and a lower bound function M−(xi)) is set based on the input data with the spread of errors. An inequality system is established with respect to the suiting region and the suiting function having undetermined parameters. A distance from a boundary of a solution region of the parameter values, corresponding to a boundary of the suiting region, is set, and a suiting function f(x) which has the parameter values maximizing the distance, is found. A broken line exhibits a suiting function f′(x) having low robustness, and a solid line exhibits a most-robust suiting function f(x) obtained from an application of this invention.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: October 30, 2001
    Inventor: Masaharu Ishii
  • Patent number: 6272448
    Abstract: The present invention relates to a method and an apparatus which reproduce a digital terrain model (DTM) from contour data with geomorphological consistency and natural features including fine folds. An initial DTM ho is produced (step 101), and set ho as an initial value (step 102). Then the operator T which smooths the elevational values along flowing water lines or the neighborhood of the lines is operated on the DTM h (step 103), further the operator B which sets the boundary values by substituting the contour data is operated on the DTM h (step 104). The number n of operating times of the steps 103 and 104 is checked (step 105). If n is less than preset number nmax, return to the step 103 and if n reaches nmax, go to the step 106 and the DTM h is output.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: August 7, 2001
    Assignee: Kobashigawa
    Inventor: Masaharu Ishii
  • Patent number: 6032106
    Abstract: A suiting region (lying between an upper bound function M.sup.+ (x) and a lower bound function M.sup.- (x)) is set by an input having a certain spread, such as error. Inequalities are established between this suiting region and a suiting function containing undetermined parameters. These inequalities are approximated to a finite number of inequalities for the parameters and are solved, whereby a solution region is found. One internal point of this solution region is selected, whereby one suiting function f(x) contained in the suiting region is obtained.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: February 29, 2000
    Inventor: Masaharu Ishii
  • Patent number: 5690895
    Abstract: A flow cell apparatus, useful in an apparatus for measuring particles suspended in a liquid, comprises a sample liquid, supply device, a sheath liquid supply device, a flow cell which has a flow passage passing through a transparent measuring portion, and a nozzle for causing the sample liquid, from the supply device to flow in the flow passage of the flow cell. The nozzle has at least one discharge port which is disposed in the flow passage in a spaced relation from the inner wall of the flow cell flow passage. The sheath liquid supply device causes the sheath liquid to flow around the nozzle discharge port and surround the sample liquid flow to form a sheath flow. The flow passage of the flow cell and the nozzle are so formed as to ensure a sample liquid flow of a fixed width through the measuring portion.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: November 25, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Masaetsu Matsumoto, Isao Yamazaki, Ryo Miyake, Masaharu Ishii, Ryohei Yabe, Hiroshi Ohki, Hideyuki Horiuchi, Shinichi Sakuraba
  • Patent number: 5519635
    Abstract: In order to provide an apparatus for chemical analysis capable of eliminating time consuming changing connections of flow paths and analytical elements, and of operating for analysis without any special knowledge, the apparatus for chemical analysis comprises a main body of analytical apparatus provided with sampling device for sucking sample, liquid controller for transferring the sucked sample and reagents, and detector for measuring the sample, and analytical unit provided with a liquid connector and a signal connector for connecting to the main body of analytical apparatus, and memory storing at least analytical method, and analysis of the sample is performed by attaching and fixing the analytical unit to said main body of analytical apparatus, transferring at least analytical method stored in the memory to the main body of analytical apparatus, and analyzing the sample in accordance the said analytical method.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: May 21, 1996
    Assignee: Hitachi Ltd.
    Inventors: Ryo Miyake, Masaharu Ishii, Hideo Enoki, Isao Yamazaki, Kazumichi Imai, Tadafumi Kuroishi, Yu-ming Hsueh
  • Patent number: 5149831
    Abstract: Methylnorbornene dicarboxylic anhydride is produced from a C.sub.6 -C.sub.7 fraction containing 5-methylcyclopentadiene by carrying out the reaction in the presence of a maleic anhydride and a protonic acid at a temperature of, whereby the 5-methylcyclopentadiene is isomerized to 1-MCPD and 2-MCPD which undergo a Diels-Alder reaction to form methylnorbornene dicarboxylic anhydride.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: September 22, 1992
    Assignee: Tonen Corporation
    Inventors: Hiroshi Furukawa, Hiroyuki Inagaki, Masaharu Ishii, Hiroshi Ueno
  • Patent number: 4613285
    Abstract: In a free piston type oscillating compressor, closed spaces separate from gas springs are provided, and pressures of the closed spaces are regulated, whereby the amplitude, and central position of the stroke, of a free piston can be precisely controlled.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: September 23, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Eiji Sato, Tamio Fukuda, Masaharu Ishii, Mitsuru Nakamura, Yozo Nakamura
  • Patent number: 4234296
    Abstract: A screw compressor including a male rotor and a female rotor forming a pair, a rotor casing enclosing the pair of rotors and cooperating therewith to define a working chamber for compressing gas, a suction port and a discharge port formed in a suction cover and a discharge cover respectively provided to the rotor casing, a slide valve mounted at one part of the rotor casing for axial movement to return gas from the working chamber to the suction side of the compressor, a radial discharge port formed in the slide valve, and an axial discharge port formed in the discharge cover and smaller in size than the radial discharge port. The slide valve is formed therein with at least one gas flow passageway for communicating the working chamber with the discharge port only when the compressor operates in a controlled capacity mode.
    Type: Grant
    Filed: June 6, 1979
    Date of Patent: November 18, 1980
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Matsubara, Shigekazu Nozawa, Masaharu Ishii, Mitsuhiko Miyagawa
  • Patent number: 4035727
    Abstract: A multichannel transmitter incorporating a phase-locked loop frequency synthesizer to generate a carrier signal of a selected radio frequency, which carrier is subsequently amplified, modulated, and radiated into space. In order to prevent abnormal radiation which would take place as when the PLL frequency synthesizer is switched from one transmission channel to another, a transmission stopper circuit is connected to the output of the phase comparator or detector of the synthesizer so as to be actuated thereby when the desired phase or frequency lock is not established in the synthesizer. When actuated, the transmission stopper circuit prevents the wave radiation of the transmitter, as by causing nonconduction through a transistor provided therein. The invention is disclosed as adapted for a transceiver.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: July 12, 1977
    Assignee: Shinto Denki Co., Ltd.
    Inventor: Masaharu Ishii