Patents by Inventor Stephen Allan Collum

Stephen Allan Collum 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).

  • Telescoping form
    Patent number: 6786463
    Abstract: A telescoping form for forming a void in poured concrete is disclosed. The form has an upper section defined by a plurality of sides, the upper section of plastic composition, and a lower section capable of telescoping into the upper section, the lower section of plastic composition. The telescoping form may be permanent. The telescoping form may have a lid removably mounted to the upper section of the form.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: September 7, 2004
    Inventor: Stephen Allan Collum