Patents by Inventor Tatsuo Maeda

Tatsuo Maeda 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: 7221729
    Abstract: An X-ray computer tomography apparatus which performs prep scanning prior to main scanning to acquire information for use in reconstruction of a tomographic image for diagnosis, the main scanning including rotary scanning around a rotation axis, and axial scanning along the rotation axis, the X-ray computer tomography apparatus includes determination unit which determines a speed based on a change of a characteristic amount concerning information obtained by the prep scanning, and a unit which controls, to the determined speed, a speed of the axial scanning in a period from the start to the completion of the main scanning.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: May 22, 2007
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Misako Wakai, Shinsuke Tsukagoshi, Tatsuo Maeda
  • Patent number: 7149571
    Abstract: To provide a portable biological data measuring apparatus capable of measuring, storing and displaying biological data of a human being, in particular. The apparatus includes a GND electrode (12B) and a minus electrode (12C) which are provided on the opposite side faces of a roughly rectangular parallelopiped-shaped chassis (11), and a plus electrode (12A) provided on the face curved into an elliptical arc shape in cross section and adjacent to the opposite faces on which the GND electrode (12B) and the minus electrode (12C) are provided, in which biological data is measured using the plus electrode (12A), the GND electrode (12B) and the minus electrode (12C).
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: December 12, 2006
    Assignee: Parama Tech Co., Ltd.
    Inventor: Tatsuo Maeda
  • Publication number: 20060233296
    Abstract: An X-ray computer tomography apparatus which performs prep scanning prior to main scanning to acquire information for use in reconstruction of a tomographic image for diagnosis, the main scanning including rotary scanning around a rotation axis, and axial scanning along the rotation axis, the X-ray computer tomography apparatus includes determination unit which determines a speed based on a change of a characteristic amount concerning information obtained by the prep scanning, and a unit which controls, to the determined speed, a speed of the axial scanning in a period from the start to the completion of the main scanning.
    Type: Application
    Filed: April 12, 2006
    Publication date: October 19, 2006
    Inventors: Misako Wakai, Shinsuke Tsukagoshi, Tatsuo Maeda
  • Patent number: 7092682
    Abstract: A shaped-wave application section inputs a first pulse signal corresponding to transmission data output from a transmission data output section, and applies, to a modulation and amplification section, a signal wave corresponding to a second pulse signal such that the waveform of the first pulse signal is shaped. The pulse signal applied to the base of the transistor of the modulation and amplification section is amplitude-modulated into an amplitude-modulated wave in which the amplitude-modulated portion is strengthened, in accordance with the signal wave corresponding to the second pulse signal applied to the emitter thereof. The amplitude-modulated wave is supplied to an antenna section including a resonance circuit via the collector thereof, and is transmitted as an electromagnetic wave from the antenna section.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: August 15, 2006
    Assignee: Sony Corporation
    Inventors: Tatsuo Maeda, Akihiko Yamagata
  • Patent number: 7004399
    Abstract: An antenna unit prevents a communication error by suppressing side lobes formed by an antenna coil segment of a reader/writer device. The antenna unit (200) is used for a reader/writer device (20) whose signal processing circuits (210) and (220) communicate with an IC card (10) via electromagnetic waves, wherein an antenna coil (100) of the IC card (10) relatively gets close to the antenna unit (200). The antenna unit (200) includes the antenna coil segment which forms a loop antenna (202) on a substrate (201) and conductor segments (203) at the periphery of the antenna coil on substantially the same plane of the antenna coil.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: February 28, 2006
    Assignee: Sony Corporation
    Inventors: Tatsuo Maeda, Akihiko Yamagata
  • Publication number: 20050001026
    Abstract: An antenna unit prevents a communication error by suppressing side lobes formed by an antenna coil segment of a reader/writer device. The antenna unit (200) is used for a reader/writer device (20) whose signal processing circuits (210) and (220) communicate with an IC card (10) via electromagnetic waves, wherein an antenna coil (100) of the IC card (10) relatively gets close to the antenna unit (200). The antenna unit (200) includes the antenna coil segment which forms a loop antenna (202) on a substrate (201) and conductor segments (203) at the periphery of the antenna coil on substantially the same plane of the antenna coil.
    Type: Application
    Filed: September 10, 2003
    Publication date: January 6, 2005
    Inventors: Tatsuo Maeda, Akihiko Yamagata
  • Publication number: 20040132417
    Abstract: A shaped-wave application section inputs a first pulse signal corresponding to transmission data output from a transmission data output section, and applies, to a modulation and amplification section, a signal wave corresponding to a second pulse signal such that the waveform of the first pulse signal is shaped. The pulse signal applied to the base of the transistor of the modulation and amplification section is amplitude-modulated into an amplitude-modulated wave in which the amplitude-modulated portion is strengthened, in accordance with the signal wave corresponding to the second pulse signal applied to the emitter thereof. The amplitude-modulated wave is supplied to an antenna section including a resonance circuit via the collector thereof, and is transmitted as an electromagnetic wave from the antenna section.
    Type: Application
    Filed: October 9, 2003
    Publication date: July 8, 2004
    Applicant: Sony Corporation
    Inventors: Tatsuo Maeda, Akihiko Yamagata
  • Publication number: 20030097078
    Abstract: To provide a portable biological data measuring apparatus capable of measuring, storing and displaying biological data of a human being, in particular. The apparatus includes a GND electrode (12B) and a minus electrode (12C) which are provided on the opposite side faces of a roughly rectangular parallelopiped-shaped chassis (11), and a plus electrode (12A) provided on the face curved into an elliptical arc shape in cross section and adjacent to the opposite faces on which the GND electrode (12B) and the minus electrode (12C) are provided, in which biological data is measured using the plus electrode (12A), the GND electrode (12B) and the minus electrode (12C).
    Type: Application
    Filed: November 15, 2002
    Publication date: May 22, 2003
    Applicant: PARAMA TECH
    Inventor: Tatsuo Maeda
  • Patent number: 6343209
    Abstract: A tuner for both digital and analog use that can receive both digital broadcast and analog broadcast signals, includes a signal input terminal; a frequency conversion section which converts and inputted signal to an IF signal; and a switching/distributing section which, based on the type of received signal (analog/digital), switches a destination to which to send the IF signal or distributes the IF signal. There is also a down-converter section, that further converts the IF signal into a Low IF signal; a terminal for output of the IF signal. The aforementioned components are all contained in a single body that performs an electromagnetic seal function. Operation of the switching/distributing section and/or the down-converter section may be controlled by a control signal from a structural element within the body.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: January 29, 2002
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuo Maeda, Shigeto Masuda
  • Patent number: 5944306
    Abstract: The improved package of thermal recording sheets comprises a container of a stack of thermal recording sheets and a humidity control agent that is secured to the container having an opening through which the thermal recording sheets can be taken out individually. The improved magazine comprises an enclosure for accommodating sheetings that have their sensitivity varied with humidity changes, a cover that is adapted to be opened or closed with respect to the enclosure and a mechanism for engaging the cover with the enclosure, wherein all areas of the cover that mate with the enclosure are furnished with a moisture resisting structure. Both the package and magazine ensure that a plurality of sheetings such as thermal recording films that are highly sensitive to moisture can be held at all times in a desired humidity environment in a moisture controlled state, especially in the interior of a thermal image recording apparatus.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: August 31, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tatsuo Maeda, Koichi Okada, Nobuyuki Torisawa
  • Patent number: 5595845
    Abstract: An electrophotographic photosensitive member is constituted by disposing charge generation layer and a charge transport layer in succession on a support. The charge generation layer contains oxytitanium phthalocyanine, an azo pigment and a hindered phenol. The electrophotographic photosensitive member including such a charge generation layer is usable for providing an apparatus unit and an electrophotographic apparatus showing excellent electrophotographic characteristics such as a suppressed photomemory, good potential stability in repetitive use and good image-forming properties.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: January 21, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuo Maeda, Hideki Anayama, Yoichi Kawamorita, Hiroyuki Ohmori, Mayumi Kimura
  • Patent number: 5431748
    Abstract: An electric-resistance-welded steel pipe with high strength consists essentially of 0.05 to 0.30 wt. % C, 0.6 to 2.0 wt. % Mn, 0.03 to 0.70 wt. % Si, and 0.01 to 0.05 wt. % Nb. The balance is Fe and inevitable impurities, the steel pipe having a martensitic phase ratio of 60 to 100% and having a tensile strength of 120 to 170 kgf/mm.sup.2.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: July 11, 1995
    Assignee: NKK Corporation
    Inventors: Tatsuo Maeda, Toshihiro Takamura, Yoshiichi Ishizawa, Yuji Sugimoto, Mitoshi Morimoto, Tetsuro Sugayoshi, Fumihiro Nishimura
  • Patent number: 5286309
    Abstract: An electric-resistance-welded steel pipe with high strength. The pipe consists essentially of (a) 0.05 to 0.30 wt. % C, (b) 0.6 to 2.0 wt. % Mn, (c) 0.03 to 0.70 wt. % Si, (d) (i) 0.5 wt. % or less Mo by itself or (ii) 0.5 wt. % or less Mo with 1.2 wt. % or less Cr or (iii) 0.5 wt. % or less Mo with 0.1 wt. % or less V or (iv) 0.1 wt. % or less V and (e) the balance being Fe and inevitable impurities. The steel pipe has a martensitic phase in an amount of 60 to 100% and has a tensile strength of 120 to 170 kgf/mm.sup.2. The steel pipe is useful as an impact bar for the inside of an automobile door.
    Type: Grant
    Filed: December 24, 1991
    Date of Patent: February 15, 1994
    Assignee: NKK Corporation
    Inventors: Tatsuo Maeda, Toshihiro Takamura, Yoshiichi Ishizawa, Yuji Sugimoto, Mitoshi Morimoto, Tetsuro Sugayoshi, Fumihiro Nishimura
  • Patent number: 5223364
    Abstract: The electrophotographic photoconductor of the present invention includes a conductive substrate and a photosensitive layer containing perylene pigment as a charge generating material formed on the conductive substrate. The X-ray diffraction peak of the perylene pigment exhibits its peak when the value of 2.theta. is 14.degree.(.+-.0.3.degree.), and the half-width of the peak when the value of 2.theta. is 14.degree. (.+-.0.3.degree.) is 0.5 or more. This electrophotographic photoconductor has excellent qualities of low residual potential and stabilized quality.
    Type: Grant
    Filed: July 2, 1991
    Date of Patent: June 29, 1993
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Tatsuo Maeda, Eiichi Miyamoto, Nariaki Muto
  • Patent number: 5185228
    Abstract: The present invention provides an electrophotosensitive material having a layer containing a binding resin, a charge transferring material and a biphenyl derivative of the following formula [I], or a compound of which energy level in a triplet state is not more than the energy level in an excited state of the charge transferring material. The present invention prevents the charge transferring material from being decreased in charge amount and sensitivity due to light irradiation: ##STR1## wherein R.sup.1 is an aryl or aralkyl group.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: February 9, 1993
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Tatsuo Maeda, Masato Katsukawa, Hiroaki Iwasaki, Yasufumi Mizuta
  • Patent number: 5153088
    Abstract: This invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed thereon, the photosensitive layer includes a perylene compound (I) and an X-type metal-free phtalocyanine as a charge-generating ingredient and a diamine derivative (II) as a charge-transferring ingredient in the binding resin. This electrophotosensitive material is especially superior in sensitivity and reproductivity. Formulas (I) and (II) are defined as follows: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9 l, m, n, o and p have the same meanings as defined in the text of the specification.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: October 6, 1992
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Nariaki Muto, Tatsuo Maeda, Hirotsugu Nishikawa, Mikio Kakui, Keisuke Sumida, Toru Nakazawa
  • Patent number: 5106536
    Abstract: A stable .alpha.-type titanyl phthalocyanine composition including an .alpha.-type titanyl phthalocyanine and a metal-free phthalocyanine is disclosed having a wide range of absorption wavelengths and high in spectral sensitivity. The method for making the phthalocyanine composition is carried out by pigmenting a concentrated sulfuric acid solution containing at least titanyl phthalocyanine by an acid paste process. The concentrated sulfuric acid solution is poured into water to produce an .alpha.-type titanyl phthalocyanine composition which is stable to withstand the impact of aging. Also disclosed is an electrophotographic sensitive material which includes a sensitive layer having the .alpha.-type titanyl phthalocyanine composition superposed on an electroconductive substrate. This electrophotographic sensitive material excels in its charging property and its dark attenuation property and exhibits high sensitivity and low residual potential.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: April 21, 1992
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Eiichi Miyamoto, Nariaki Mutou, Tooru Nakazawa, Tatsuo Maeda
  • Patent number: 5059503
    Abstract: The present invention provides an electrophotosensitive material containing the diamine derivative represented by the following general formula (I) and at least one selected from the group consisting of the hydrazone compound, fluorene compound and m-phenylenediamine compound. ##STR1## wherein R.sup.5 to R.sup.9, l, m, n, o and p are as defined.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 22, 1991
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Nariaki Muto, Tatsuo Maeda, Toshihiko Nishiguchi, Mikio Kakui, Keisuke Sumida, Toru Nakazawa
  • Patent number: D470590
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: February 18, 2003
    Assignee: Parama Tech Co., Ltd.
    Inventors: Tatsuo Maeda, Akira Iizuka
  • Patent number: D475462
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: June 3, 2003
    Assignee: Parama Tech Co., Ltd.
    Inventors: Tatsuo Maeda, Akira Iizuka