Patents by Inventor Leif W.ang.rd

Leif W.ang.rd 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).

  • Anaesthetic system which is automatically switched to temporary operation as an open breathing system upon a change in an anesthetic, and method for operating same
    Patent number: 5699788
    Abstract: An anaesthetic system, which can be switched between an open system and a rebreathing system, includes a breathing circuit, a setting unit and a switching unit. When the breathing circuit is connected as a rebreathing system and a change in anaesthetic concentration or a change of anaesthetic type is initiated via the setting unit, the switching unit automatically sets the breathing circuit as an open system for a predetermined period of time, at the end of which the breathing circuit is automatically reset as a rebreathing system.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: December 23, 1997
    Assignee: Siemens Elema AB
    Inventors: Anders Lekholm, Leif W.ang.rd