Patents by Inventor Sture Ronnback

Sture Ronnback 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).

  • Device for extinguishing the flame of a candle
    Patent number: 4818214
    Abstract: A burning candle (5, 8) is provided with a sleeve (7, 7') of heat-shrinkable plastics. When affected by the heat generated by the flame (6) of the lit candle the sleeve (7, 7') shrinks and at least partly closes about the end of the candle (5, 8), thus extinguishing the candle flame (6).
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: April 4, 1989
    Inventor: Sture Ronnback