The European post notes: "up to 30% of all expenditure in R&D is wasted on redeveloping existing inventions."
Elsewhere the post notes that top scientific journals such as Nature refer to patents.
***In passing, on blogs
What's Hot Online which on 29 Jan links to Wicked Lasers Torch - Burn Paper
--"Do you expect me to talk?" "No Mr. Bond, I expect you to die," -- but 007 evaded the wicked laser