Example: ul > li will match all <li> elements that are inside a <ul> element. Descendant selectors. The ' ' combinator selects nodes that are children (not necessary direct children) of the former specified element. Example: div span will match any <span> element that is inside a <div> element.
Generic Firazyr. Because a patent is in place until  July 2014, companies are currently not allowed to make a generic version of Firazyr (icatibant). However, after this patent expires, a generic product may become available.
Researching expiration dates and terminal disclaimers in a patent family that takes two patent pages to explain is too large a task for idle curiosity. So, the idle curiosity answer is that the important SawStop patents probably expire somewhere around 2021, give or take two or three years. Remember, it would be foolish to use this information for anything other than satisfying idle curiosity or impressing friends at the TechShop.