My thouths exactly. Looks like the patent[1] is more about the sleeve than the actual circuit (because well, I guess it would/should be hard to patent Joule thi

My thouths exactly. Looks like the patent[1] is more about the sleeve than the actual circuit (because well, I guess it would/should be hard to patent Joule thief[2]). [1] https://www.google.com/patents/US20120121943 https://www.google.com/patents/US20120121943 [2] http://en.wikipedia.org/wiki/Joule_thief http://en.wikipedia.org/wiki/Joule_thief