James Watt was granted his first patent on a steam engine in 1769, but he ran into financial difficulties in trying to exploit it. Fortunately, he was to find a solid businessman-Matthew Boulton-to handle the finances and marketing. In 1775, the firm of Boulton & Watt was established and obtained a twenty-five-year extension of Watt's patent. Watt's inventive genius and Boulton's keen eye for new markets and applications was a successful combination,...