The mouse was made by one of IDEO&#x27;s precursor companies Hovey-Kelley. 
See <a href="http:&#x2F;&#x2F;www.ideo.com&#x2F;work&#x2F;mouse-for-apple&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.ideo.com&#x2F;work&#x2F;mouse-for-apple&#x2F;</a>
and
<a href="http:&#x2F;&#x2F;www.wired.com&#x2F;2014&#x2F;08&#x2F;the-engineer-of-the-original-apple-mouse-talks-about-his-remarkable-career&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.wired.com&#x2F;2014&#x2F;08&#x2F;the-engineer-of-the-original-ap...</a>