Talk-Polywell.org

Please show me a public domain invention that ever went anywhere... Well, I see you've already gotten some good replies to this. But more generally, anything invented more than 20 years ago. This includes common fasteners such as screws, bolts, nuts, etc. You will notice that companies are still ma...

I don't see that anyone in this discussion has mentioned that the USPTO (U.S. Patent Office) recently revised its process to make it more difficult to obtain a patent. You now have to demonstrate your invention or discovery is "non-obvious"; that it's not just a trivial variation on what others have...