Patents by Inventor Clayton S. Brown

Clayton S. Brown 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).

  • Patent number: 3968601
    Abstract: A secondary handhole is placed in a small excavation in the ground to a depth where its cover is at ground level. It is a comparatively lightweight, portable, substantially strong and essentially unitary structure, which is shipped ready for installation at an excavation site. It provides a protective housing for secondary cable connections of underground electrical utlities and assures their prompt location by observing its ground surface level cover. The secondary handhole, in one embodiment made of fiberglass, has a three-sided rectangular body, with two sides being spaced by a reinforcing cross member extending across the bottom. There are vertical notches in the body at its open end, which extend from the top to a point just below the midline of the body to receive a removable gate extending between the two sides at an elevation higher than the location of the reinforcing cross member.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: July 13, 1976
    Inventors: Clayton S. Brown, Joseph Jacobs