Patents by Inventor Jan R. Jacobsson

Jan R. Jacobsson 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).

  • Protective device for protection against radiation during welding
    Patent number: 4169655
    Abstract: A protective device is disclosed which is useful in protecting an operator against radiation emitted during welding. The protective device, which is employed in the presence of a surrounding light source, includes an interference filter which has a spectrally selective portion with bands for one or more of the ranges of wavelengths present in the emission spectrum of the surrounding light source and a radiation absorbing portion which attenuates the radiation to a value harmless to the eye without interfering with the spectrally selective portion of the interference filter.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: October 2, 1979
    Assignee: AGA Aktiebolag
    Inventor: Jan R. Jacobsson