Patents by Inventor Seiichi Watanabe

Seiichi 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).

  • Method for controlling slippage between rolls and a slab in a continuous compression casting apparatus
    Patent number: 4148349
    Abstract: In a continuous compression casting process for making a casting slab such as steel, the problem of the occurrence of slippage; between the casting slab and the rolls is effectively overcome by a control means for releasing or gradually decreasing the braking action of the braking rolls.
    Type: Grant
    Filed: May 5, 1977
    Date of Patent: April 10, 1979
    Inventors: Yutaka Sumita, Seiichi Watanabe
  • Process for producing chloroprene monomer having a little content of acetaldehyde
    Patent number: 4130596
    Abstract: Chloroprene having a little content of acetaldehyde is produced by dehydrochlorination of 3,4-dichlorobutene-1 in the presence of an aqueous solution of an alkali metal hydroxide by treating with an ammonium ion donor during or after the dehydrochlorination or in both the steps.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: December 19, 1978
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takashi Kadowaki, Michio Nishimura, Seiichi Watanabe, Koichi Abe
  • Apparatus for detecting a surface flaw of a material at high temperature
    Patent number: 4118732
    Abstract: The present invention is an apparatus for detecting a surface flaw in hot metal including a particularly designed television camera, a shutter means and a control circuit which compensates the television camera's shading as well as the temperature difference among normal parts of the observed material.The apparatus makes it possible to conduct clear detection of a flaw on the surface of the hot material as it is so that yield loss at the time of scarfing can be avoided while heat energy can effectively be utilized.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: October 3, 1978
    Assignee: Nippon Steel Corporation
    Inventors: Isamu Ichijima, Seiichi Watanabe, Kazuo Miyagawa
  • Resonant circuit using variable capacitance diode
    Patent number: 4003009
    Abstract: A resonance circuit having an inductor, a capacitor and a semiconductor with a junction, and means for applying a signal to the semiconductor junction. The semiconductor junction satisfies the equation: ##EQU1## where C represents the capacitance of the semiconductor junction when a voltage V is applied thereto and the junction of the semiconductor is reverse biased, C' is a constant, and the inductor and capacitor are connected in series.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: January 11, 1977
    Assignee: Sony Corporation
    Inventor: Seiichi Watanabe
  • High frequency amplifier with frequency conversion
    Patent number: 3949306
    Abstract: A high frequency amplifier comprising an amplifying circuit, an emitter follower which makes the output impedance of the amplifying circuit low and an impedance matching network consisting of a coil and a condenser and connected between the amplifying circuit and the emitter follower, in which an operation voltage for the amplifying circuit is supplied thereto through a bias resistor for the emitter follower and a coil of the impedance matching network.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: April 6, 1976
    Assignee: Sony Corporation
    Inventors: Seiichi Watanabe, Takashi Yoshikawa