Multitouch has been around for over a decade. Apple didn't invent multitouch, they bought it, and relabeled it.
Multitouch has been around for almost three decades. Nobody could buy it, even Apple.
He didn't say they invented it. He said "Apple's multitouch." As you pointed out, they bought Fingerworks, so they own whatever IP Fingerworks created.
Note that Fingerworks' patents are mostly about ergonomic gestures on top of keyboards and other opaque surfaces. They have little or nothing to do with the iPhone.
And that's pretty much the general case with Apple stuff. They take the best of existing technology, stuff that's being ignored by the industry and maximize it's potential... then everybody tries to duplicate it and it just becomes the norm.
They also tend to wait until the right price and technology meet.
While that was a smart economic move, Apple gets no kudos for sitting on their hands during the hard years while other companies gave us working smartphones starting with tiny B&W screens and 9Kbps speeds... and had to struggle with keeping backward compatibility with those devices.