Patents by Inventor Bruce Rolfe

Bruce Rolfe 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).

  • Chalk line helper
    Patent number: 6138370
    Abstract: A chalk line helper having a generally planar top section, a generally planar bottom section, the bottom section having a plurality of bottom projections positioned perpendicular to the bottom section, a front leading edge, a rear following edge, a first side section having a first wing-shaped projection, the first wing-shaped projection generally slanted toward the rear following edge and inward toward the top section, and a second side section having a second wing-shaped projection, the second-wing shaped projection generally slanted toward the rear following edge and inward toward the top section.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: October 31, 2000
    Inventor: Bruce Rolfe