Wayne Westerman and John Elias are the two engineers who are responsible for much of Apple's multi-touch technology found in the iPhone and notebook trackpads. Westerman and Elias originally founded a company called Fingerworks in 1998 and developed a number of multi-touch input devices including keyboards and touch-pads. Apple then acquired Fingerworks in 2005 and Westerman has been a senior engineer at Apple since. Many of the multi-touch patents coming out of Apple have since credited Westerman as the lead inventor.
In a University of Delaware news article from October of 2008, Westerman gives some rare comments about his inspiration when first designing these multi-touch interfaces.
Westerman had apparently suffered from a "stubborn bout" of tendonitis which was later relieved by the use of this touch-sensitive technology:
While Fingerworks' input accessories did receive critical praise during their lifetime, they never achieved significant mainstream success before the acquisition. Apple has been more cautious by slowly introducing multi-touch into their Macs. At present, multi-touch technology is limited to notebook trackpads and the iPhone itself."I had an ergonomic problem and I paired it with a motivation," Westerman said of the early inspiration. "I'd always felt that playing the piano was so much more graceful and expressive than using a computer keyboard, and I thought how great it would be if I pulled some of that expression from the piano to the computer experience."
Apple, however, is continuing to hire more multi-touch engineers. Their latest job listing is seeking a "Gesture Algorithms Engineer" -- a position that likely didn't exist even a year ago. This potential hire would become part of the engineering team responsible for creating Apple's "next-generation input devices and displays". Apple has been hiring Multi-Touch specialists for almost a year now, and previous patent applications show the possibilities of what could be accomplished with advanced gesture recognition.
Article Link: Apple's Multi-Touch Designer Describes His Inspiration, More to Come?