Patents Assigned to Grace Japan Kabushiki Kaisha
  • Radiowave absorbing body of the high electrical power-resistant type
    Patent number: 4939024
    Abstract: A high electrical power-resistant radiowave absorbing body is disclosed comprising a carbon fiber fabric embedded in inorganic cement. The fabric can be woven or nonwoven. Carbon fiber fabrics of different densities can be used to develop a concentration gradient to enable wide frequency band absorption.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: July 3, 1990
    Assignee: Grace Japan Kabushiki Kaisha
    Inventors: Shigeru Oosawa, Haruyuki Yoshigahara, Toshio Yukuta