memmurphy,
This is what Microsoft tried to pull and got caught:
"Microsoft is accused of making companies such as NEC, Hitachi and Sony, who want to pre-install its Windows software on their computers, sign away their right to sue, even if they find Microsoft has used their patent technology."
Making your customers sign a contract saying "if you want our product, fine, as long as you contractually agree you can't sue us even if we ignore your rights and gain from the use of your patented technology." Would you sign it? You just might have to, initially, as MS has you by the "jewels".
Re-inventing and and improving others' technology, without infringing on legal patents is another matter. If a foreign company violates US patents, they get stopped, as best as possible. The same happens if a US company infringes on a foreign company's patents, and rightfully so.
The point in this case is MS's long standing arrogant policy and practice to bypass legal and moral business laws for their sole benefit at the expense of their customers.
Thank goodness for Linux...the next 3 - 5 years is going to be interesting.
Greg