Patents Assigned to Marvin Gottlieb
  • Patent number: 5198290
    Abstract: Disclosed is an electromagnetic wave shielding material comprising a flexible base fabric, a first metallic film formed by flame-spraying a metal such as zinc on one side of said base fabric and a second metallic film such as an aluminum foil formed on the other side of said base fabric; said first metallic film does not peel after long lapse of time and can provide sufficient shielding effect to be used in unechoic chambers etc.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: March 30, 1993
    Assignees: Yoshio Niioka, Marvin Gottlieb
    Inventor: Yoshio Niioka
  • Patent number: 5117229
    Abstract: What is disclosed is a wave absorber comprising an electromagnetic wave absorbing framework having a plurality of cells arranged to define arbitrary shape of U-shaped hollow spaces adapted to the wavelength of the electromagnetic wave to be absorbed, which is prepared by introducing bubbles into an inorganic fluid material, followed by solidification, and an electromagnetic wave absorbing ferrite material applied at least on the walls of the cells defining said U-shaped hollow spaces; wherein the main body of the electromagnetic absorber may have on the surface a weathering-resistant electromagnetic wave transmitting panel comprising a composite of ceramic plate and a Kevlar cloth, glass cloth or other ground fabric or the same inorganic fluid material constituting the wave absorbing framework optionally containing a Kevlar fiber or glass fiber; said wave absorber may be formed to serve also as a building block.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: May 26, 1992
    Assignees: Yoshio Niioka, Marvin Gottlieb
    Inventor: Yoshio Niioka
  • Patent number: 5103231
    Abstract: Disclosed is a wave absorber, comprising a wave absorbing panel prepared by forming a mixture containing a ferrite powder, a metal fiber, a molding material and a resin into a framework, by means of molding and/or press-cutting, having an arbitrary shape of hollow spaces which are adapted to the frequency and wavelength of an electromagnetic wave, and an electrically conductive filter plate, made of a mixture of a ferrite powder, a metal fiber and a resin, laminated thereon. The wave absorber may have a weathering-resistant electromagnetic wave transmitting plate on the surface thereof and the electromagnetic wave transmitting plate may comprise a reinforced ceramic panel made by laminating a ceramic plate with a Kevlar cloth, glass cloth or other web.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: April 7, 1992
    Assignees: Yoshio Niioka, Marvin Gottlieb
    Inventor: Yoshio Niioka
  • Patent number: 5021205
    Abstract: A concrete manufacturing process includes pouring a fluidized cement containing a short fiber as an admixture into a concrete manufacturing mold; applying a predetermined level or levels of pressure to the entire fluidized cement poured into the mold, while a gas is introduced into the cement; and hardening the cement as the gas introduced thereto forms bubbles which burst and generate vibration when they are vented through a venting section provided for the mold. When the cement is hardened to some degree, the hardening may be continued in a temperature-controlled liquid bath or followed by curing with steam.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: June 4, 1991
    Assignees: Yoshio Niioka, Marvin Gottlieb
    Inventor: Yoshio Niioka