Patents by Inventor Henry Andreassen

Henry Andreassen 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).

  • Flexible formwork
    Patent number: 5829915
    Abstract: A formwork (1), particularly for use when casting horizontally and slopingly lying areas. The formwork (1) is substantially formed as a flat bag of PVC or another suitable cloth material consisting of a top cloth (1) and a bottom cloth attached to each other along the edges through welding or by means of zip fasteners. Between top cloth (1) and bottom cloth, a number of spacers (4) are disposed.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: November 3, 1998
    Inventor: Henry Andreassen