Patents by Inventor Masao Izawa

Masao Izawa 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: 6542698
    Abstract: A shading hood member for a digital camera, which can easily be attached to a liquid crystal monitor of a digital camera of the existing type, and which has a simple structure and is compact in size, and which can be manufactured at low cost, is disclosed. The shading hood member is detachably attached to the liquid crystal monitor in such a manner as to cover the periphery of the liquid crystal screen of the liquid crystal monitor that is openably provided on the outside surface of a camera body.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: April 1, 2003
    Assignee: Kakuyo Co., Ltd.
    Inventor: Masao Izawa
  • Publication number: 20020097997
    Abstract: A shading hood member for a digital camera, which can easily be attached to a liquid crystal monitor of a digital camera of the existing type, and which has a simple structure and is compact in size, and which can be manufactured at low cost, is disclosed. The shading hood member is detachably attached to the liquid crystal monitor in such a manner as to cover the periphery of the liquid crystal screen of the liquid crystal monitor that is openably provided on the outside surface of a camera body.
    Type: Application
    Filed: May 2, 2001
    Publication date: July 25, 2002
    Inventor: Masao Izawa
  • Patent number: 5287063
    Abstract: An automatic calibration circuit for a maximum and minimum value detection apparatus including a maximum value detection circuit for detecting and outputting a maximum value of an input signal, and a minimum value detection circuit for detecting and outputting a minimum value of the input signal. In a calibration mode, a reference signal of a fixed value is automatically inputted to the maximum value detection circuit and to the minimum value detection circuit upon entry of a calibration mode. An offset voltage of at least one of the maximum value detection circuit and the minimum value detection circuit is automatically adjusted so that the maximum value and the minimum value obtained in response to the reference signal become equal.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: February 15, 1994
    Assignee: Kikusui Electronics Corporation
    Inventor: Masao Izawa
  • Patent number: 5272449
    Abstract: A vertical amplifier system for a multitrace oscilloscope including a first and a second variable gain amplifiers each connected to each channel of a multitrace oscilloscope. First, a first reference voltage is fed to the two variable gain amplifiers at the same time. The polarity of output of the second variable gain amplifier is inverted, and the inverted output is added to the output of the first variable gain amplifier by an adder. The added result is detected by a resistor. A CPU automatically controls a gain of at least one of the variable gain amplifiers while receiving the added result so that the added result becomes zero. Second, a second reference voltage (a ground level voltage, for example) is applied to both variable gain amplifiers, and an offset of at least one of the variable gain amplifiers is adjusted so that the added result detected by the resistor becomes zero. The input-output characteristics of both variable gain amplifiers are equalized with high accuracy.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: December 21, 1993
    Assignee: Kikusui Electronics Corporation
    Inventor: Masao Izawa
  • Patent number: 5223768
    Abstract: A data display apparatus with a function for correcting the effect of external magnetic field including a display, a driving circuit for driving the display, an adjuster for adjusting a display position of input signal, a detector for detecting an output voltage of the driving circuit, and a difference detection circuit. The difference detection circuit detects a difference between an output of the detector when a predetermined reference signal is inputted as the input signal and an output of the detector when a display position of the predetermined reference signal is adjusted to a reference position on the screen of the display by the adjuster. The difference is stored in a memory as calibration data for correcting the effect of external magnetic field or the like.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: June 29, 1993
    Assignee: Kikusui Electronics Corporation
    Inventors: Masao Izawa, Yuji Fujita
  • Patent number: 5176140
    Abstract: In an ultrasonic probe for use in ultrasonic endoscope, ultrasonic diagnosing apparatus and other ultrasonic apparatuses, an ultrasonic vibrator is arranged in a recess formed in a cylindrical housing and is secured thereto such that portions of first and second electrodes are exposed out of the recess. First and second lead wires are embedded in the housing such that tips of the lead wires are exposed within connecting areas formed in the housing in communication with the recess. The tips of the first and second lead wires are connected to first and second electrodes of the ultrasonic vibrator with the aid of conductive members made of solder, conductive paste or conductive adhesive agent. The other end of the first and second lead wires are extended from the same end face of the cylindrical housing.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: January 5, 1993
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kuniaki Kami, Masashi Abe, Masao Izawa, Takanao Fujimura, Yukihiko Sawada, Masaaki Hayashi, Shuichi Takayama, Takashi Tsukaya, Takeaki Nakamura, Masanori Hamazaki, Takahiro Echizenya, Yoshihisa Taniguchi, Hironobu Aoki, Fukashi Yoshizawa, Yoshiro Nishimura, Hiroshi Suzushima
  • Patent number: 5162750
    Abstract: A band limiter connected between output lines of a differential amplifier. The band limiter includes a bipolar transistor connected to the output lines via capacitors, and includes a temperature detecting device for detecting ambient temperature. Transistor capacitance is connected to or disconnected from the output lines in response to a bandwidth limiting signal. The transistor constitutes a low-pass filter functioning as a band limiter when it is closed, whereas it functions as a variable capacitor which varies its capacitance in accordance with the ambient temperature when it is opened. The high-band frequency characteristic of the differential amplifier is temperature compensated by the transistor functioning as a variable capacitance.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: November 10, 1992
    Assignee: Kikusui Electronics Corporation
    Inventors: Takeshi Ito, Masao Izawa
  • Patent number: 5138239
    Abstract: A vertical amplifier apparatus with a beam-finding function for an oscilloscope including an analog multiplier and a gain control circuit. The analog multiplier multiplies an input signal to the vertical amplifier by a gain control signal. The gain control circuit outputs a DC voltage as the gain control signal. In a beam-finding mode, the gain control circuit supplies the analog multiplier with the gain control signal whose absolute value is much smaller than that of the gain control signal in a normal mode. This makes is possible to obviate a dedicated beam-finder circuit. In a multi-channel oscilloscope, the beam-finding operation can be performed independently for each channel.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: August 11, 1992
    Assignee: Kikusui Electronics Corporation
    Inventors: Masao Izawa, Hidenori Tomishima
  • Patent number: 4556639
    Abstract: A method for dislodging cultured cells has the steps of preparing a culture container which has a growing surface on which cultured cells are grown, and which is filled with a culture solution in contact with the cultured cells, supporting the culture container on a pedestal to be reciprocally movable in a direction parallel to the growing surface, and reciprocally moving the culture container in the direction parallel to the growing surface and thus applying an inertial force on the cultured cells in the direction parallel to the growing surface, thereby dislodging the cultured cells from the growing surface. An apparatus for dislodging cultured cells has the pedestal for supporting the culture container and a reciprocating device for reciprocally moving the culture container supported on the pedestal in the direction parallel to the growing surface.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: December 3, 1985
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Masao Izawa, Sachiko Tatsukawa
  • Patent number: 4339537
    Abstract: Biological substances such as tissues, cells, vaccines and viruses are cultured by the steps of: introducing a culture solution having the substances suspended therein into a closed culture vessel having a plurality of disc-like implantation plates arranged horizontally with a certain space between successive plates so that a predetermined number of the implantation plates is immersed in the culture solution; culturing the substances on the surface of the implantation plates; removing the substances from the implantation plates; suspending the removed cultured substances in a new culture solution; and successively repeating the steps of culturing, removing the cultured substances and suspending in a new culture solution while each time increasing the amount of newly supplied culture solution to progressively increase the number of implantation plates immersed in the culture solution.
    Type: Grant
    Filed: November 6, 1979
    Date of Patent: July 13, 1982
    Assignee: Olympus Optical Company Limited
    Inventors: Shinroku Sogi, Masao Izawa, Shinichiro Hattori, Ikuo Tawara, Daizo Shinohara, Sachiko Tachikawa
  • Patent number: 4176376
    Abstract: An image processing system converts gradation data of an image signal from a television camera into a digital code and transfers it to a computer. In the image processing system suitable means slice a portion which contains data of the image signal at a given level, means quantize a signal waveform obtained by the slice means, means count how many numbers of pulses obtained by the quantizing means at a given portion of one horizontal scan during each horizontal scan, and means for transfer counted values of the counting means to the computer at every completion of one horizontal scan.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: November 27, 1979
    Assignee: Olympus Optical Company Limited
    Inventors: Shinichi Kamachi, Masao Izawa, Nagahiro Gocho, Yoshio Nakajima, Shinichiro Hattori
  • Patent number: 4154652
    Abstract: Tissues or cells of a living body, especially a human body, are automatically and successively cultivated in a nutrient solution filled culture container disposed in a gas-sealed culture box by detecting, within the culture box, a multiplication condition of the tissues or cells and culture conditions which are represented by temperature, humidity and gaseous atmosphere in the culture box and pH value of the nutrient solution, controlling the culture conditions and apparatus for subculture of the tissues or cells within the culture box in accordance with the information detected.
    Type: Grant
    Filed: June 10, 1976
    Date of Patent: May 15, 1979
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Ichiro Sawamura, Shinroku Sogi, Shin-ichi Kamachi, Makoto Yoshinaga, Atsuo Goto, Masao Izawa, Yoshio Nakajima, Nagahiro Gocho, Toshio Shinohara, Shinichiro Hattori
  • Patent number: 4090921
    Abstract: An apparatus for automatically cultivating tissues or cells of a living body comprises a main body the inside of which is maintained in a predetermined atmosphere by an atmosphere control means. A container containing the tissues or cells and a nutrient solution is disposed in the main body and cultivated or multiplied tissues or cells in the container divided and fed for subculture into a plurality of empty cultivating containers disposed in the main body by an operating means which performs necessary operations for subculture. The atmosphere control means and the operating means are totally controlled by an apparatus control means.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: May 23, 1978
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Ichiro Sawamura, Shinroku Sogi, Shin-ichi Kamachi, Makoto Yoshinaga, Atsuo Goto, Masao Izawa, Yoshio Nakajima, Nagahiro Gocho, Toshio Shinohara, Shin-ichiro Hattori
  • Patent number: 3980921
    Abstract: An illuminating device for a microscope provided with a lighting control circuit controlled by changing the firing angle for which an impedance means is inserted between the output side of said lighting control circuit and primary side of the transformer in order to obtain a gentle rising curve for the current at the time of firing, thus to reduce the noise.
    Type: Grant
    Filed: January 21, 1975
    Date of Patent: September 14, 1976
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Masao Izawa
  • Patent number: D526672
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: August 15, 2006
    Assignee: Kakuyo Co., Ltd.
    Inventor: Masao Izawa