Patents by Inventor Altti Lehto

Altti Lehto 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).

  • Dust bag for use in a vacuum cleaner
    Patent number: 4539027
    Abstract: A general purpose dust bag for a vacuum cleaner adaptable to various vacuum cleaners. According to the invention, the external surface of the dust bag's end (4) adjacent to its mouth (2) is provided with an attachment device (7), such as a strip of paper 24 glued to the dust bag, the external surface of said strip 24 having thereon a permanent adhesive for securing a desired cassette plate to said bag.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: September 3, 1985
    Assignee: Raupak Oy
    Inventors: Mikael Fornas, Raimo Sipila, Altti Lehto