Yep, that would help. From what I can tell, the wheelchair patent is aspirational and they haven't actually implemented the majority of standard autonomous vehicle practices.
Maybe demand a working model for the patent, but also reject a patent if anybody else has something similar in development?
So you have a brilliant idea like "lets put email on a cell phone", but the infrastructure isn't in place to support it yet. A few years later you finally get it working, but now you can't patent because there are 5 other companies who started the process at basically the same time--once the prerequisite technology was in place.
This would reduce the number of patents on "the most obvious way to solve this obvious problem that only appears because the technology has advanced enough" that patent trolls love.
So many of the "do X, but now on a computer" patents wouldn't be a thing.
Requiring a working prototype would also make it hard to issue vaguely worded and extremely broad patents, so someone can't claim ownership over the entire concept of sending push notifications for example.
