Quote from Tracy McGreedy:
You're not serious, are you? Assuming they are not yours, you cannot infringe on existing patents, and borrow technologies for free to register new ones. Tell me, you're a tech by day and lawyer by night?
Improving a new technology and applying for a patent on it isn't an infringement on an existing patent, unless you start to use it commercially. It's a situation that happens a lot, particularly in the pharmaceutical industry - an original researcher will develop a new drug then patent it, then a competitor will develop a composition/formulation of the drug which is say more easily absorbed then patent that. The original patent holder can't use that composition without infringing the second patent, and the competitor can't sell their composition because it infringe the original patent. This results in either the original patent holder coming up with their own composition, licensing the rights to the composition from the competitor or cross-licensing so that both may sell similar products.
Pharmaceutical companies are the likeliest to do this because they're happy to collaborate with a competitor to develop new products while at the same time simultaneously sue each other in dozens of countries over dozens of different patents, and not bear a grudge. It's just business. Though part of the reason why pharmaceutical drugs are so expensive.
Software companies don't seem to co-operate to this level, perhaps because software patents are so recent and haven't matured, or because most software companies are headed by egomaniacs.
I'm a registered patent attorney with a science background.
