In the letters section of the latest issue, FWW add's an apology for describing a device that Lee Valley retains the patent (a magnetic dovetail jig), and FWW suggests that you should not make this device yourself, and instead buy it from Lee Valley.
IANAL, but I have talked to patent experts.
There is nothing illegal about disclosing a patent, as it is public information.
It has been explained to me that there is nothing illegal about making a patented device for your own use. In fact, this is encouraged, as it helps future inventions. Perhaps we can improve on an old invention. However, selling it is illegal.
There are moral issues - and some may decide to buy the jig from LV instead of making one themselves. Doing so shows respect, and I do respect LV.
But I also respect creativity and inventivity.
Sorry Robin, but if I can find a way to make something for myself that is better than something you sell, I will do so. I hope you understand.