Patents by Inventor Rumult Iltis

Rumult Iltis 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: 4683904
    Abstract: A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest, such as soil. The oscillator circuit includes two spaced plates in the substance which function as a capacitor. The frequency of the oscillations changes as the capacitance between the plates changes due to the moisture present between the plates. The sensor is particularly adapted for use as a soil moisture detector and provides indications of moisture percentage or end points such as wet or dry conditions.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: August 4, 1987
    Assignee: Ranya L. Alexander
    Inventor: Rumult Iltis
  • Patent number: 4657039
    Abstract: A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest. The oscillator circuit includes two spaced plates in the substance and functioning as a capacitor. The frequency of the oscillations changes as the capacitance between the plates changes due to the moisture present between the plates. The sensor is particularly adapted for use as a soil moisture detector and provides indications of wet or dry conditions.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: April 14, 1987
    Assignee: Ranya L. Alexander
    Inventors: Richard L. Bireley, Rumult Iltis
  • Patent number: 4245643
    Abstract: A method and apparatus are disclosed for measuring the ohmic, that is, purely d-c, resistance at the area of contact between cardiac tissue and a pacemaker electrode surgically implanted in the heart of a patient requiring a pacemaker. The contact resistance is measured by apparatus connected across the electrical circuit formed by the electrode and heart.
    Type: Grant
    Filed: August 15, 1979
    Date of Patent: January 20, 1981
    Assignee: Children's Hospital Medical Center
    Inventors: George Benzing, III, Rumult Iltis