November 1966: A section of Trail-A-Sled, Inc.'s patent for the innovative continuous rubber track, the first of it's kind made in America.  Although finalized in November of 1966, the patented design was first used in production machines in the fall of 1964.  The firm's single most important innovation, the continuous rubber track was initially used to propel the nimble all-fiberglass Scorpion for 1965.  Leveraging their innovation, Trail-A-Sled spun-off Rubber Drives, Inc. who manufactured this and similar tracks through 1971, not only for Scorpion but for a large number of other firms as well.  Genuinely unique at the time, the durable rubber track gave the struggling firm an edge and was key to fueling the years of explosive growth that were soon to follow.  United States Patent and Trademark Office. See Terms of use. Link to Home.