Patents by Inventor Nils Bertil Jacobson

Nils Bertil Jacobson 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).

  • Test and control device for electrosurgical apparatus
    Patent number: 3933157
    Abstract: An electrosurgical apparatus having a diathermy current generator connected to an active electrode and a two-segment inactive electrode in surface engagement with the patient includes a test and control device automatically sensing the sum of the contact impedances of the two inactive electrode segments and inhibiting the passage of the diathermy current through the patient if the sensed impedance value is too high or too low. The sensing of the contact impedances is effected at intervals during periods when no diathermy current flows and is accomplished by means of alternating current.
    Type: Grant
    Filed: October 23, 1973
    Date of Patent: January 20, 1976
    Assignee: Aktiebolaget Stille-Werner
    Inventors: Per Henrik Bjurwill, Nils Bertil Jacobson