Yes, Google is using other people's work. They didn't invent the computer, for example. So what? If their part of it was negligible, somebody else would have given me a useful voice recognition system by now. Why doesn't notepad have a microphone icon on it? If notepad added a microphone icon tomorrow, do you think it would work well? Check your priorities. Delivering a working solution that I can actually use matters a lot more to me than writing a paper.