Patents by Inventor Erwin Hoffman

Erwin Hoffman 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).

  • Emission spectral analysis device
    Patent number: 4318614
    Abstract: In a device for the emission spectral analysis of samples, including an evaporating tube for receiving and thermally evaporating a sample, and a hollow cathode and anode for athermally exciting the evaporated sample, the evaporation tube forms said cathode. The anode and cathode are mounted adjacent one another in spaced apart relationship along the axis of the tube.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: March 9, 1982
    Assignee: Jenoptik Jena GmbH
    Inventors: Heinz Falk, Erwin Hoffman, Christian Ludke