According to &#x27;The Innovators&#x27;, the early Gates negotiated a non-exclusive license for the use of his sisters catchers mitt :)<p><a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;The-Innovators-Hackers-Geniuses-Revolution&#x2F;dp&#x2F;147670869X" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;The-Innovators-Hackers-Geniuses-Revolu...</a>