4
votes
2answers
1k views

Here is what I see as an invalid patent. US6563040

I demonstrated a solar tracking mount I built at a Renewable Energy Fair, MREA Midwest Renewable Energy Association. in Custer. Wisconsin. Several thousand people saw it on or about June 21st 2001. A ...
18
votes
2answers
2k views

Can we not invalidate older patents? - i.e. World Inc vs Blizzard Entertainment

I saw down below where someone was asking how long we have to invalidate or send in a submission of a patent up to 6 months after it is published. Does that mean that 3rd parties can not go back and ...