Earlier quoted context omitted.
Finding a patent triples your vulnerability to infringement claims, and since the USPTO is rubber-stamping overbroad garbage rather than sanely enforcing the novelty and non-obviousness requirements, the answer to "is this patented?" is basically always yes. Edit: I'm not claiming that this particular patent is invalid (I can't safely read it, of course), only that invalid patents are so prevalent and dangerous that…
I agree, but there are times when you might want to check. So "Speak For Yourself" was founded by two Speech Pathologists [1] and they have been working with Autistic children for years. PRC's product seems to be the market leader (and of course its patented) and perhaps in part because it is patented it is very expensive. They had to have seen one, I expect they have even used them, and I would speculate they though…
In this particular instance, was you sister "skilled in the art" of developing treadmills or software? If not, and it's obvious her her, chances are it's blindingly obvious to someone who is skilled in those arts, and presumably works in those fields.