Patents by Inventor Helge Hofmann

Helge Hofmann 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).

  • High frequency surgical instrument with a fluid infeed passage
    Patent number: 6210411
    Abstract: A high frequency surgical instrument which has at least one treatment electrode (11, 11′, 11″) which can be or is connected to a high frequency generator (12), which is at least partly fluid-permeable and to which a fluid, in particular a liquid, which counteracts the sticking of the biological tissue to the treatment electrode (11) can be or is fed in through at least one liquid infeed passage (13). At least the region (11, 11′, 11″) of the treatment electrode which is intended for the interaction with the biological tissue consists totally or partly of a liquid-permeable, porous, biologically compatible sinter material.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: April 3, 2001
    Assignee: Gebrueder Berchtold GmbH & Co.
    Inventors: Helge Hofmann, Gernod Fritzsch
  • Trocar for laparoscopic operations
    Patent number: 5925044
    Abstract: A trocar for laparoscopic operations on patients has a tube and high frequency connections in the region of the front end of the tube which can be connected to a high frequency generator. A cutting bar is axially displaceable in the tube and can be fixed in a cutting position. The high frequency connections and electrosurgical cutting device connected to the latter are arranged at the front end of the cutting bar.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: July 20, 1999
    Assignee: Gebrueder Berchtold GmbH & Co.
    Inventors: Helge Hofmann, Gernod Fritzsch, Wolfram Hill