Patents by Inventor Gerhard M. Risch

Gerhard M. Risch 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).

  • Apparatus for dilution of liquid specimens
    Patent number: 4056360
    Abstract: An apparatus intended for a stepwise extraction of fluids, specifically for a dilution of liquid specimens. The apparatus comprises telescopically arranged suction pistons.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: November 1, 1977
    Inventor: Gerhard M. Risch