Seismic wave - Notation. 1  The path that a wave takes between the focus and the observation point is often drawn as a ray diagram. 2  For example... 3  ScP is a wave that begins traveling towards the center of the Earth as an S wave. 4  sPKIKP is a wave path that begins traveling towards the surface as an S-wave.
A patent is a legal right granted by the UK Intellectual Property Office for a new invention. It allows the owner of the patent (the patentee) to take legal action against others who use his invention without his permission. The right has a maximum life-time of 20 years in most countries, from the date of the patent application. What a patent does not do is give the owner an automatic right to use the invention.
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.