Patents by Inventor Isao Okada
Isao Okada 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).
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Patent number: 11938346Abstract: A particle beam therapy apparatus has a position and posture setter that moves a movable body, that is at least one of the irradiation nozzle and the treatment table. A movement path of the movable body is determined when adapting the positional posture of the movable body from one condition among a plurality of prescribed conditions to another condition. An evaluation value is obtained for adapting the positional posture of the movable body to each of a plurality of prescribed conditions. This evaluation value is for a case of moving the movable body according to the movement path. A setting order is determined for adapting the positional posture of the movable body to each prescribed condition based on the evaluation value; and the positional posture of the movable body is adapted to each of the plurality of prescribed conditions by moving the movable body according to the determined movement path.Type: GrantFiled: October 16, 2019Date of Patent: March 26, 2024Assignee: HITACHI, LTD.Inventors: Hiroki Takahashi, Masanori Suzuki, Takuto Yagihashi, Takeshi Fujita, Isao Furuse, Yuko Okada
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Publication number: 20080290916Abstract: A system clock signal generator circuit comprising a first PLL circuit that is frequency and phase locked to a wobble signal; a frequency and phase comparator for comprising a first output signal from the first PLL circuit with a system clock signal as frequency divided by M and for outputting a second output signal based on the differences in frequency and in phase; a PLL filter for providing a predetermined cutoff to the second output signal to output a third output signal; a pulse width modulating circuit for generating a pulse wave, the carrier frequency of which is a second reference clock signal, and for outputting a fourth output signal obtained by modulating the pulse width of the pulse wave by the third output signal; a low pass filter for smoothing the fourth output signal to output a fifth output signal; a VCO circuit the control voltage of which is the fifth output signal; a first frequency divider circuit for frequency dividing an output signal of the VCO circuit by N to output a system clock sigType: ApplicationFiled: May 26, 2004Publication date: November 27, 2008Inventors: Isao Okada, Tsuyoshi Hirabuki
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Publication number: 20040090889Abstract: The recording pulse generator performs plural signal processing with one delay line, with regard to the control of recording signals in writing pit data onto the surface of a disk. The recording pulse generator includes a first delay line connected to the common power supply line with a PLL oscillator having a second delay line, having plural circuit elements equivalent to the second delay. line cascaded in multiple stages, a means that generates plural clocks each having different phase differences with a clock inputted to the first stage, according to the number of stages of the plural circuit elements of the first delay line, a means that selects an arbitrary clock from plural clocks generated, and a recording pulse generation means that generates a recording pulse whose pulse width is controlled on the basis of a clock selected.Type: ApplicationFiled: October 28, 2003Publication date: May 13, 2004Applicant: ROHM CO., LTD.Inventors: Isao Okada, Tsuyoshi Hirabuki, Noriyuki Kotani
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Patent number: 6359949Abstract: An optical disc apparatus has a demodulation circuit performing an FSK demodulation by being provided with a binary signal which is obtained by binarizing a signal reproduced from an optical disc on which an FSK modulation signal is previously recorded. An edge interval of the binary signal is measured. An FSK modulation component is obtained from a difference between a measured edge interval value and a previously determined edge interval reference value. A demodulation value is obtained based on a moving average of the FSK modulation component. A moving average of the demodulation value is compared with a reference value so as to obtain a binary FSK demodulation signal. Additionally, the optical disc apparatus includes a decode circuit for decoding binary data from a biphase code signal which is reproduced from an optical disc and to be inverted at an end of each bit.Type: GrantFiled: July 20, 2000Date of Patent: March 19, 2002Assignee: Mitsumi Electric Co., Ltd.Inventors: Isao Okada, Tsuyoshi Hirabuki
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Patent number: 6175542Abstract: An optical disc apparatus has a demodulation circuit performing an FSK demodulation by being provided with a binary signal which is obtained by binarizing a signal reproduced from an optical disc on which an FSK modulation signal is previously recorded. An edge interval of the binary signal is measured. An FSK modulation component is obtained from a difference between a measured edge interval value and a previously determined edge interval reference value. A demodulation value is obtained based on a moving average of the FSK modulation component. A moving average of the demodulation value is compared with a reference value so as to obtain a binary FSK demodulation signal. Additionally, the optical disc apparatus includes a decode circuit for decoding binary data from a biphase code signal which is reproduced from an optical disc and to be inverted at an end of each bit.Type: GrantFiled: May 22, 1998Date of Patent: January 16, 2001Assignee: Mitsumi Electric Co., Ltd.Inventors: Isao Okada, Tsuyoshi Hirabuki
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Patent number: 5946279Abstract: A speed error detecting portion detects a speed error which is a frequency difference between a reproduced clock signal which is reproduced from a recording medium and a reference clock signal. A first phase error detecting portion detects a phase error which is a phase difference between the reproduced clock signal and the reference clock signal. A servo signal generating portion generates a servo signal which is used for eliminating the speed error and phase error. A second phase error detecting portion detects a phase error which is a phase difference between a reproduced synchronization signal reproduced from the recording medium separately from the reproduced clock signal and a reference synchronization signal. A reference phase changing portion changes the phase of the reference clock signal based on the phase error detected by the second phase error detecting portion.Type: GrantFiled: April 23, 1997Date of Patent: August 31, 1999Assignee: Mitsumi Electric Co., Ltd.Inventors: Isao Okada, Tsuyoshi Hirabuki
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Patent number: 5625248Abstract: A piezoelectric buzzer includes a piezoelectric diaphragm stored in a case having a case body and a back cover, and a pair of metal terminals which are electrically connected to the piezoelectric diaphragm and drawn out from the back cover. The metal terminals have terminal drawing portions, terminal fixing portions which are arranged along an inner surface of the back cover, and connecting portions which are bent from inner ends of the terminal fixing portions so that the bent portions are substantially U-shaped as viewed from above while forward ends thereof are separated from the inner surface of the back cover and brought into contact with the piezoelectric diaphragm.Type: GrantFiled: October 13, 1994Date of Patent: April 29, 1997Assignee: Murata Manufacturing Co., Ltd.Inventors: Shuho Saito, Isao Okada, Osamu Segawa, Toshiaki Yamashita
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Patent number: 5307503Abstract: A circuit module includes one or a plurality of semiconductor parts, a substrate having the semiconductor parts mounted thereon, and terminals arranged on an outer periphery of the substrate along a plurality of sides of said substrate. The circuit module is connected to a board of a computer by plugging the terminals into corresponding terminal holes, so that the terminals are used in common for providing electrical connection and mechanical connection with the board of the computer.Type: GrantFiled: June 27, 1990Date of Patent: April 26, 1994Assignee: Mitsumi Electric Co., Ltd.Inventors: Isao Okada, Yoshiyuki Kato, Koji Ide, Toshihiko Yasuma, Richard G. Geiger, Akio Tanaka, Ryuichi Sada, Mikito Baba
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Patent number: 4366296Abstract: A thermoplastic, substantially resinous, unsaturated, random copolymer of ethylene, propylene or 4-methyl-1-pentene with a branched 1,4-diene of the formula ##STR1## wherein R.sup.1 is an alkyl group of a maximum of 8 carbon atoms, and each of R.sup.2 and R.sup.3 is hydrogen or an alkyl of a maximum of 8 carbon atoms, exclusive of the case where both R.sup.2 and R.sup.3 are both hydrogen.Type: GrantFiled: January 15, 1982Date of Patent: December 28, 1982Assignee: Mitsubishi Petrochemical Company LimitedInventors: Sadao Kitagawa, Isao Okada
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Patent number: 4315088Abstract: This invention relates to a process for producing an .alpha.-olefin polymer having a high stereoregularity in a high yield by polymerizing .alpha.-olefin in the presence of a catalyst composed of solid catalyst component (I) prepared by contacting (A) magnesium halide, (B) aromatic carboxylic acid ester, (C) halogen compound of titanium, and (D) siloxyaluminum compound with each other, and (II) an organometallic compound of a metal of Group I to III in the Periodic Table.Type: GrantFiled: December 11, 1979Date of Patent: February 9, 1982Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Sadao Kitagawa, Isao Okada, Teruo Saito
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Patent number: 4237254Abstract: A process for producing olefin polymers comprising contacting an ethylenically unsaturated monomer comprising at least one olefin monomer with a catalyst system comprising a combination of a catalyst component I and a catalyst component II as described hereunder:Catalyst component IA solid product obtained by contacting the following constituents (a), (b) and (c) or (a), (b), (c) and (d) together:(a) A solid reaction product of a magnesium compound containing a hydroxyl group attached to magnesium and an organoaluminum compound represented by the formula R.sub.n AlX.sub.3-n wherein R represents a hydrocarbon residue having from 1 to 20 carbon atoms, X represents a halogen atom and n represents a number of greater than zero but not greater than 1.5, i.e. 0<n.ltoreq.1.Type: GrantFiled: April 25, 1978Date of Patent: December 2, 1980Assignee: Mitsubishi Petrochemical Company LimitedInventors: Sadao Kitagawa, Isao Okada, Teruo Saito, Shoichi Masukawa, Yoshihisa Watanabe, Makoto Imanari
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Patent number: 4020118Abstract: A process for producing isoprene trimers by the catalytic oligomerization of isoprene which comprises effecting said oligomerization in the presence of a catalyst system comprising:A. a reducible nickel compound;B. an aluminum compound of the formula:AlR.sub.m (OR').sub.3.sub.-mwherein R and R' respectively represent an alkyl group having from 1 to 10 carbon atoms or an aryl group, and m is an integer of 0 to 3;C. a reaction product of triethyl phosphite and pentaerythritol; andD. a monohydric alcohol having from 2 to 6 carbon atoms.Type: GrantFiled: February 11, 1976Date of Patent: April 26, 1977Assignee: Mitsubishi Petrochemical Company LimitedInventors: Hiroyuki Morikawa, Takahiro Sato, Isao Okada