Patents by Inventor Janet Grassmann

Janet Grassmann 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).

  • Publication number: 20030167848
    Abstract: The invention refers to a device for the detection of changes in the density of a solid, liquid or gaseous medium. The device is capable of detecting the effects of physical and/or chemical parameters, causing changes in the density and/or compression constants of the medium. The device comprises a transmitter unit for transmitting a send signal, having a constant frequency and amplitude and the send signal, comprising a minimum of one period, with a minimum of one receiver unit receiving the response signals reflected and/or transmitted from the medium. The transmitter and receiver units are coupled to the medium. The receiver unit is coupled to an A/D converter and a sampling device. The transmitter unit and the output of the A/D converter are coupled to a numerical processor for determination of the phase shift between the send signal and the receive signal, with the output being connected to a display. A memory may be used instead of a display.
    Type: Application
    Filed: October 21, 2002
    Publication date: September 11, 2003
    Inventors: Eckard Glaser, Miroslaw Wrobel, Janet Grassmann, Stergios Stergiopoulos
  • Publication number: 20030074953
    Abstract: The invention relates to a device for determining the change in the density of a solid, liquid or gaseous medium. Said device is able to detect effects on the density of the medium caused by physical and/or chemical parameters which cause changes in the density of the medium. The device comprises an emission device (2) for emitting any kind of emission signal having at least one period. Said emission device is coupled to the medium (3). At least one receiving device (7) picks up the response signals which are reflected and/or transmitted from the medium. A comparator (6) follows each receiving device, the receiving device being connected across one input of the comparator and the emission device being respectively connected across the other input thereof. The outputs of the comparators are coupled to a processing and sample selecting device which is followed by a display screen (9).
    Type: Application
    Filed: September 5, 2002
    Publication date: April 24, 2003
    Inventors: Eckard Glaser, Miroslaw Wrobel, Janet Grassmann