The U.S. Patents and Trademarks Office issued utility patent number 6,511,741 to Ronald C. Hungarter for a roofing layout tape.
On January 28, 2003, the U.S. Patents and Trademarks Office issued utility patent number 6,511,741 to Ronald C. Hungarter, President of THOR® Systems Inc., Larksville, Pa., for his work involving the creation of a roofing layout tape designed to revolutionize the steep-slope roofing industry. Spin-offs of this asphalt shingle roofing layout tape concept, providing both horizontal and vertical shingle alignments are currently being developed, with new tapes already designed for the metal roofing industry.