Patents by Inventor Yoshio Watanabe

Yoshio Watanabe 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: 5499101
    Abstract: An image forming apparatus includes an image memory section in an image processing section for temporarily storing an image signal read from an optical system via a photoelectric transducer section, an arithmetic section for numerical computation based on data stored in the image memory section, a decision section adapted to conclude that an image forming operation should be interrupted when a variation rate E of the image signal is lower than a threshold value T read from a ROM as a result of computation by the arithmetic section, and to conclude that the image forming operation should be continued when the variation rate E is equal to or higher than the threshold value T. A section is also provided for interrupting the image forming operation in response to a command from the decision section when there is no operator's key entry to order the interruption or execution of the image forming operation within a predetermined period of time.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: March 12, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshio Watanabe
  • Patent number: 5497254
    Abstract: An optical apparatus for controlling a wave front of a coherent light including at least a coherent light source, an electrically addressable liquid crystal device having a plurality of pixels receiving the light from said light source, and a signal generator for recording a complex amplitude distribution or hologram on the liquid crystal device.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: March 5, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Jun Amako, Hirotsuna Miura, Tomio Sonehara, Yoshio Watanabe
  • Patent number: 5472590
    Abstract: An ion sensor having an ion selectivity, which comprises an internal electrode of metal/metal salt, composed of an electroconductive layer of at least one metal and a layer of an insoluble salt of the metal in contact with the electroconductive layer, an ion selective membrane whose supporting membrane is composed of a hydrophobic polymer, and an intermediate layer capable of keeping water molecules, provided between the internal solid electrode and the ion selective membrane, where the organic compound having a water-keeping property is polymethylene glycol, polyethylene glycol or polypropylene glycol, each having a molecular weight of 200 to 600, and the inorganic compound having a water-keeping property is calcium chloride, gold chloride, magnesium perchlorate, magnesium fluoride or vanadium chloride dioxide, is suitable for analysis of specific ion species in a biological fluid with practically prolonged maintenance of properties of electrode.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: December 5, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Koutarou Yamashita, Mamoru Taki, Yuji Miyahara, Toshiko Fujii, Satoshi Ozawa, Yoshio Watanabe
  • Patent number: 5438299
    Abstract: A PLL circuit comprising a phase comparator unit which forms a differentiation signal based upon both edges of an external signal, outputs an early pulse only during a period in which the differentiation signal is overlapped on a period from the leading edge to the trailing edge of a reference signal, and outputs a late pulse only during a period in which the differentiation signal is overlapped on a period from the trailing edge to the leading edge thereof, a charge pump unit which calculates and compares the amounts of integration of the early pulse and the late pulse, lowers the output voltage when the amount of the late pulse is larger than the amount of the early pulse and raises the output voltage when it is smaller, and a VCO which outputs a corrected reference signal of which the frequency decreases or increases accompanying the increase or decrease in the output voltage of the charge pump unit, wherein the VCO is controlled by the output voltage of the charge pump unit and by the early pulse and the
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: August 1, 1995
    Assignees: Shinko Electric Industries, Co., Ltd., Fujitsu Limited
    Inventors: Toshizi Shimada, Yasunori Kanai, Yoshio Watanabe
  • Patent number: 5434411
    Abstract: Infrared radiation is incident on a total reflection plane of a prism and penetrates a liquid sample through a metal layer put between the total reflection plane and the liquid sample in close contact therewith whereby the infrared radiation is partially absorbed by the liquid sample. Alternatively, the liquid sample may be put between the total reflection plane and the metal layer in close contact therewith so that part of the light penetrates the sample from the prism through the total reflection plane to interact with the metal layer and then is caused to reenter into the prism whereby it is partly absorbed by the liquid sample. The metal layer is for enhancing the intensity of the electric field component of the infrared radiation. The incident angle of the infrared radiation on the total reflection plane is so set that the partially absorbed infrared radiation is total-reflected.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: July 18, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Miyahara, Toshiko Fujii, Yoshio Watanabe
  • Patent number: 5413685
    Abstract: An ion-selective electrode comprises an ion-sensing membrane, an internal electrode adhered to the ion-sensing membrane, and a lead connected to said internal electrode. The internal electrode used comprises a plurality of metallic wires arranged into a grating or a mesh. The wires comprises a metal core and a surface layer of a salt of the metal. The metal of the core is silver and the salt of the metal is a silver halide selected from the group consisting of silver bromide, silver chloride and silver iodide. At least a part of the internal electrode is buried inside the ion-sensing membrane. Various components, the ion-sensing membrane, the internal electrode, the lead, an external terminal, are disposed in a flow-through cell having a flow path formed therein, through which path a sample solution is passed, to constitute the ion-selective electrode. In the flow-through cell is disposed a means of maintaining the humidity to feed water vapor therefrom to the ion-sensing membrane.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: May 9, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Ozawa, Yuji Miyahara, Mamoru Taki, Koutarou Yamashita, Yoshio Watanabe
  • Patent number: 5412413
    Abstract: A liquid jet recording head includes a base member, a liquid layer maintained on the base member and a plurality of heater elements, arranged in a line on the base member, for supplying energy to liquid adjacent thereto, the energy operation portions being put under the liquid layer. A method for making a liquid drop fly from the liquid jet recording head onto a recording sheet so that a dot image is formed on the recording sheet includes steps of (a) generating a bubble in the liquid to which the energy is supplied by each of energy operation portions in accordance with image data; (b) making the bubble grow up until a predetermined size of the bubble is obtained; (c) contracting the bubble under a condition where each of the energy portions supplies no energy to the liquid in which the bubble is formed; and (d) making the bubble disappear into the liquid.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: May 2, 1995
    Assignee: Ricoh Co., Ltd.
    Inventors: Takuro Sekiya, Takashi Kimura, Masanori Horike, Yoshio Watanabe, Shuji Motomura, Eiko Suzuki, Takayuki Yamaguchi, Masami Kadonaga
  • Patent number: 5389962
    Abstract: An ink jet recording head assembly includes: a base member having a plurality of enclosures, a top of each of the enclosures having an opening; a mechanism for supplying ink to each of the enclosures via the opening at the top thereof and for maintaining the ink at a predetermined depth; and a heater element which is provided in each of the enclosures under the ink supplied via the opening, the heater element heating the ink in each of the enclosures so that a bubble is generated in the ink; wherein an ink drop is jetted from a surface of the ink due to the bubble generated in the ink.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: February 14, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuro Sekiya, Mitsuru Shingyouchi, Takashi Kimura, Takayuki Yamaguchi, Yoshio Watanabe, Shuji Motomura, Eiko Suzuki, Masami Kadonaga
  • Patent number: 5382923
    Abstract: A charge-pump circuit for controlling a voltage controlled oscillator by converting a phase difference between two input signals, which never become low at the same time, into a voltage. The charge-pump circuit includes first and second feeder circuits, made of bipolar transistors, outputting current in accordance with the input signals; a capacitor circuit having first, second, and third capacitors, and the first and the second or the first and the third capacitors are charged by the output current from the first or the second feeder circuit; and a differential amplifying circuit amplifying the voltage between the ends of the first capacitor to a predetermined voltage for output. The differential amplifying circuit operates to draw the same leakage current from the second and the third capacitors when the first capacitor is not being charged.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: January 17, 1995
    Assignees: Shinko Electric Industries Co., Ltd., Fujitsu Limited
    Inventors: Toshizi Shimada, Yasunori Kanai, Yoshio Watanabe
  • Patent number: 5377596
    Abstract: A magnetic levitating transportation apparatus including rails and a vehicle capable of travelling along the rails by a linear motor and caused to magnetically levitate by magnet units with electro-magnets. The gap is controlled by controlling the current supplied to the magnet units in response to gap sensors. The rails include rail gaps where the ends of two rail elements abut, and rail gap sensors are arranged to detect the rail gap. Thus, current supplied to one of the magnet units is disabled when the rail gap is detected, and the current to be supplied to the associated magnet unit is stopped. The current to be supplied to the associated magnet unit is determined from the outputs of the remaining gap sensors.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: January 3, 1995
    Assignee: Fujitsu Limited
    Inventors: Yoshinobu Ono, Yoshio Watanabe, Shinjiro Tanida
  • Patent number: 5362445
    Abstract: A biochemistry analyzer includes, an attenuated total reflection prism, a sample cell disposed on a surface of the prism, a sample supplier, a device for disposing more objective molecules in the liquid sample to a near portion of the sample which is near the surface of the prism, an infrared light source for generating an infrared light which is transmitted to the attenuated total reflection prism, a detector for detecting the infrared light which is reflected from the prism after the far portion of the sample is solidified, and a computer for calculating signals from the detector. As the objective molecules are gathered near the prism, accuracy of the biochemistry analyzer becomes higher.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: November 8, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Miyahara, Toshiko Fujii, Thomas Buhrer, Yoshio Watanabe
  • Patent number: 5360470
    Abstract: A magnetic levitating transportation apparatus comprising a rail and a vehicle capable of travelling along the rails by a linear motor and caused to magnetically levitate by magnet units including permanent magnets and electro-magnets. The gap between the rail and each of the magnetic units is controlled by controlling the current supplied to the magnet units so that the current is substantially zero when the vehicle is in the levitated condition. One of the magnet units is movably mounted to the vehicle and moved by the piezoelectric actuator so that the gap between this magnet unit and the rail can be adjusted. The controller controls the piezoelectric actuator based on the current supplied to the magnet units.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: November 1, 1994
    Assignee: Fujitsu Limited
    Inventors: Yoshinobu Ono, Yoshio Watanabe, Shinjiro Tanida, Tadayuki Kojima
  • Patent number: 5352352
    Abstract: A sensor for detecting a carbonic acid gas dissolved in body fluids has a laminated structure including an outer plate having a carbonic acid gas permeable window, a plate for a pH-electrode having a pH sensitive membrane, an intermediate plate having a cavity for accommodating an electrolyte, and a plate for a reference electrode. The plate for the pH-electrode is constituted in a manner that a pH sensitive membrane constituted by a membrane of an oxide of a platinum group metal is formed on an insulating substrate and the electrolyte contacts with the pH sensitive membrane in a groove. The pH sensitive membrane is disposed so as to oppose to the carbonic acid gas permeable window.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: October 4, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Keiji Tsukada, Yuji Miyahara, Yasuhisa Shibata, Yoshio Watanabe
  • Patent number: 5344545
    Abstract: A gas sensor e.g. an oxygen sensor for testing body fluids, has a laminated structure with a cavity for holding a gel or liquid electrolyte in contact with a cathode and anodes formed by deposition on layers of the structure. The cathode contacts the electrolyte cavity only at a small-volume reaction region defined e.g. in a groove which communicates with a larger, laminar volume of the cavity formed e.g. by a spacer layer having through apertures. A small gas-permeable window opposes the cathode at the reaction region. The laminar construction can be mass-produced. The enlarged electrolyte reservoir lengthens the sensor life.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: September 6, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Keiji Tsukada, Yuji Miyahara, Yasuhisa Shibata, Yoshio Watanabe
  • Patent number: 5333241
    Abstract: A neuron unit processes a plurality of input signals and outputs an output signal which is indicative of a result of the processing. The neuron unit includes input lines for receiving the input signals, a forward process part including a supplying part for supplying weight functions and an operation part for carrying out an operation on each of the input signals using one of the weight functions and for outputting the output signal, and a self-learning part including a generating part for generating new weight functions based on errors between the output signal of the forward process part and teaching signals and a varying part for varying the weight functions supplied by the supplying part of the forward process part to the new weight functions generated by the generating part.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: July 26, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Furuta, Hiroyuki Horiguchi, Hirotoshi Eguchi, Yutaka Ebi, Tatsuya Furukawa, Yoshio Watanabe, Toshihiro Tsukagoshi
  • Patent number: 5327021
    Abstract: A waveform synthesizing circuit comprises a plurality of signal output switching means for outputting predetermined magnitudes of voltage or current signals when a voltage or current value of an input pulse reaches preliminarily assigned comparing reference values, a signal summing means for superimposing output signals from a plurality of signal output switching means for summing, and a comparing signal switching means detecting the rising and falling of the input pulse, providing the comparing reference values with given differences between a plurality of signal output switching means according to an order of operation of a plurality of signal output switching means upon the detection of a rise, and providing the comparing reference values, which are different from those for rising, with given differences between a plurality of signal output switching means according to an order of operation of a plurality of signal output switching means upon the detection of a fall.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: July 5, 1994
    Assignees: Shinko Electric Ind., Co., Ltd., Fujitsu Ltd.
    Inventors: Yasunori Kanai, Toshizi Shimada, Takahiko Nakao, Yoshio Watanabe
  • Patent number: 5327522
    Abstract: A neuron unit processes a plurality of input signals and for outputs an output signal which is indicative of a result of the processing, and includes input lines for receiving the input signals, a forward process part including a supplying part for supplying weight functions and an operation part for carrying out an operation on each of the input signals using one of the weight functions and for outputting the output signal, and a self-learning part including a function generating part for generating new weight functions based on errors between the output signal of the forward process part and teaching signals and a varying part for varying the weight functions supplied by the supplying part of the forward process part to the new weight functions generated by the generating part. The supplying part includes a memory for storing each weight function in the form of a binary value, and a generating circuit for generating a random pulse train based on each binary value stored in the memory.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: July 5, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Furuta, Hiroyuki Horiguchi, Hirotoshi Eguchi, Yutaka Ebi, Tatsuya Furukawa, Yoshio Watanabe, Toshihiro Tsukagoshi, Takahiro Watanabe, Shuji Motomura, Atsuo Hashimoto, Sugitaka Oteki, Satoshi Otsuki, Eiki Aono, Takashi Kitaguchi
  • Patent number: 5313110
    Abstract: A monostable multivibrating circuit includes: a time constant setting circuit responsive to an input pulse signal, for outputting at least one signal having a time constant different from that of the input pulse signal; and an emitter-coupled logic circuit including a first pair of transistors, one base receiving the input pulse signal and another base receiving a first reference signal, and a second pair of transistors, one base receiving an output signal of the time constant setting circuit and another base receiving a second reference signal. The monostable multivibrating circuit outputs a one-shot pulse defined by a pulse starting time corresponding to a change in level of the one base input of the first pair of transistors and a pulse stopping time corresponding to a change in level of the one base input of the second pair of transistors.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: May 17, 1994
    Assignee: Fujitsu Limited
    Inventors: Yoshio Watanabe, Tatsuaki Kitta
  • Patent number: 5294336
    Abstract: Stable hemoglobin A.sub.lc (s-A.sub.lc) can be separated from other hemoglobin components and quantitated in a short time by means of a liquid-chromatographic apparatus comprising a separation column packed with a packing material consisting essentially of a porous substance having a carboxyalkyl group combined thereinto, as ion exchanger, a means for injecting a sample into the separation column, a means for passing one or more eluents through the separation column, and a means for detecting hemoglobin, hemoglobin derivatives or glycosylated hemoglobin, the average particle size of the packing material in dry state being 4 .mu.m or less.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: March 15, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Masako Mizuno, Kenji Tochigi, Yutaka Misawa, Hiroyuki Miyagi, Yoshio Watanabe, Taro Nogami, Junkichi Miura, Yoshinori Takata
  • Patent number: 5250168
    Abstract: Disclosed is an integrated ion sensor, which comprises at least one ion selective membrane sensitive to ions contained in a solution to be measured for detecting the concentration of the ions, a signal processing circuit for inputting a detected signal obtained by the ion selective membrane through a conductive member and fetching the detected signal through MOSFETs or the like included in an input stage to process the same, a reference electrode disposed in the measuring environment made by the solution to be measured and to be set to a predetermined voltage relationship between the reference electrode and the ion selective membrane, and a power supply having negative and positive terminals for supplying a driving power to the signal processing circuit through the terminals, one of the terminals being connected to the reference electrode, wherein the signal processing circuit is set to an active state at a voltage set to the reference electrode by controlling the threshold value of at least one of the MOSFET
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: October 5, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Keiji Tsukada, Yuji Miyahara, Yasuhisa Shibata, Yoshio Watanabe