They don't hold it up like they used to. Thomas Edison was denied a patent on his light bulb and had to appeal the decision. Short answer to your questions is the Neonode N1m implemented swipe-to-unlock on a touchscreen phone in 2005, making Apple not first. Courts in the UK and Netherlands have already thrown out the patent claim.
My 1990's discman had a slide to unlock button. It was probably a novel and non-obvious feature when it was first introduced in handheld electronics. Taking real world objects and replicating a virtual version in a computer was also novel and non-obvious back in 1973 when Xerox invented the Alto (later commercialized as the Xerox Star). Now, with 34 years of virtualizing real world objects, it's suddenly non-obvious? Both PC's and Unix boxes had a swipe-to-unlock type feature in the late 80's or early 90's with their screen savers. Since the computers have multiple input devices (keyboard, mouse axes, mouse buttons) instead of just touch locations, the lock screens supported additional unlock methods (key presses, mouse clicks), but they could still be unlocked by swiping a pointing device.
Fast forward a few years to the first hand-held computers and answers to your questions. The early hand-held touch technology was generally resistive touchscreens, and difficult to operate compared to the now more common capacitive sensing. Consequently, swipe gestures did not translate well to the platform and consumers knew little of touchscreens outside of clunky interfaces that required a stylus or a hard press. For example I had a Pocket PC application that offered a swipe to scroll feature that I found too difficult to use, despite loving the idea in theory.
Apple has a history of bringing good technologies together in an attractive way, and wowed a lot of people with the iPhone. They beat everyone to market on a mobile multi touch device by buying Fingerworks, one of the leading developers of the technology, and even claimed they were the inventors of multi touch when the iPhone came out. However, there was a lot of research done in the area that most consumers never saw and multi touch devices predate both Fingerworks and the Apple Macintosh. For example, the University of Toronto built a multi touch device in 1982 and Andrew Sears (dean of computer science at RIT) described single and multi touch interactions that included a swipe-to-unlock in his research in the 90's.
I think pretty much all of Apple's claimed touchscreen inventions had already been discussed or implemented in this body of work that few consumers saw. Just making a computing device smaller and more portable is not in itself novel and given the last 70+ years of computing history is definitely obvious. Copying a feature that had been on the market for 2 years in competing devices is beyond obvious.