http://wrathgames.com/blog/2012/01/02/s ... ms-boss-1/
http://wrathgames.com/blog/2012/01/11/s ... l-goblins/
MS-PL is like CC BY, but geared against patents:
http://opensource.org/licenses/MS-PL
in other words, you're okay to use them, unless you plan to sue someone for patents in near future.