Patents by Inventor Alpo L. Marttinen

Alpo L. Marttinen 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).

  • Automatic dumping dust pan
    Patent number: 4562611
    Abstract: A long-handled self-dumping dust pan is adapted to be used by a person standing in an upright position. Long-handled dust pans of varying shapes and sizes are known. Those which are automatic dumping however, are complex, heavy and expensive to produce. The present invention overcomes these disadvantages by providing a simple, easy to produce, long-handled dust pan. It is equipped with a lever positioned close to the operator's hand which disengages a detent from a recess in the pan, thereby allowing the refuse to fall into a suitable container.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: January 7, 1986
    Inventor: Alpo L. Marttinen
  • Combined automatic dumping dust pan and broom
    Patent number: D286697
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: November 11, 1986
    Inventor: Alpo L. Marttinen