Patents by Inventor Ryuichi Sada

Ryuichi Sada 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 adjusting the circuit characteristic of a circuit body by cutting wires external to the circuit body
    Patent number: 5880016
    Abstract: Adjusting elements (R1, R2 and R3) are redundantly or preliminarily built in an IC circuit body (5), the adjusting elements (R1, R2 and R3) are connected to one another through conductor patterns (P1, P2 and P3) provided outside the circuit body (5), and after the circuit operating function is confirmed by inspection, the conductor patterns (P1, P2 and P3) are selectively cut to select an adjusting element to be used, thereby to adjust or select a function of the circuit body.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: March 9, 1999
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Ryuichi Sada, Shigemitsu Watanabe
  • Shielded circuit module with terminal pins arrayed on four sides for connection to a computer board
    Patent number: 5307503
    Abstract: 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: Grant
    Filed: June 27, 1990
    Date of Patent: April 26, 1994
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Isao Okada, Yoshiyuki Kato, Koji Ide, Toshihiko Yasuma, Richard G. Geiger, Akio Tanaka, Ryuichi Sada, Mikito Baba