You are nearly correct he did write down most of his inventions and he did have many patents on his inventions such as the self generating electrical power system like the one he used in the 1931 Pierce Arrow.
He also had a patent on a wireless electrical power transmitter aka the so called death ray which some claim was the cause of the Tanguska devastation in 1908, by Tesla's own account the incedinet occured at the exact same time he discharged an electrical pulse of energy into the atmosphere into the same quadrant as Tanguska.
After which he dismanteled the equipment.
He also discovered the usefulness of negative ion rods in drawing electricity from the negative ions in the atmosphere there by creating FREE Electricity.
Welcome to FR!
You need to visit this thread just posted by FormerLib
Tesla's tragedy and Croatia
http://www.freerepublic.com/focus/f-news/1668711/posts