Patents by Inventor Eberhard Vaas

Eberhard Vaas 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: 5114628
    Abstract: A method for the manufacture of contact lenses, especially individually fitted contact lenses, and a contact lens production system therefor is described, wherein the topography of the surface of the eye is measured three-dimensionally, the geometry of the rear face of the lens is determined so as to fit the topography measured, the optical effect of a lachrymal lens which is formed between the rear face of the lens and the surface of the eye is determined, the geometry of the front face of the lens is determined taking into account the optical effect of the lachrymal lens and the sight correction to be achieved, and the data so obtained for the lens geometry of the front and rear faces of the lens are stored and transferred to a control arrangement for the manufacture of the lens in a machine tool.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: May 19, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Peter Hofer, Peter Hagmann, Gunther Krieg, Eberhard Vaas
  • Patent number: 4902137
    Abstract: A method is proposed for detecting foreign bodies in fluids to investigate the fluids such as infusion liquids for foreign bodies which can lead to the plugging of infusion needles or other dangers for a patient. In the method light is directed onto the fluid and the light departing from this fluid is detected. The fluid is illuminated evenly with polarized light, and the light penetrating through the fluid is further dimmed by further polarization. The light intensity of individual measuring regions is measured through photo-electric sensing and the measured intensity is compared with an adjustable threshold so that when the threshold is exceeded at any given time during a measuring interval, corresponding signals are produced.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: February 20, 1990
    Assignee: Harro Hofliger Verpackungsmasghinen GmbH
    Inventors: Gunther Krieg, Gerhard Barth, Eberhard Vaas, Manfred Reiser