this company is a complete joke. for years now they have been issuing PR after PR on a "break-through" nobody even considered a problem before WNDW PR's about it. The one thing they never PR about is actually selling a single product.
In the mean time, companies in Asia and Europe which have been founded, funded, and operated for a shorter time than WNDW are SELLING actual products that do the exact stuff WNDW has been promising shareholders they'll develop for 10 years now! Their time is running out, as what was once a futuristic product, is now becoming mainstream available elsewhere.
The stock price is manipulated in quite a predictable way, if you can profit from this, fair play to you. But the actual product will never reach the market in any meaningful way.