The Humming Bird Motor, The Sun Dance Generator, many other devices including the Geet
None we know of.
Perhaps the most controversial figure in the field of free energy! The sincerity of Dennis Lee is a force to be reckoned with. Jailed for 2 Years. I feel that Dennis Lee knows what he is talking about! Some experiments he has shown prove to me that he was on the right track and was stopped by the powers that be!
I dont have a lot of information on Dennis Lee! I remember a lot of research, but saved little of it.
It is interesting to note, in the following video, we see the same setup we have seen many times before! Two Coils on One Core. What I call Partnered Output Coils! Also we see this in the works of Earl Koenig and also many more! The Kromrey Converter is another!
It is worth noting that Earl Koenig applied for, and got a Patent: 4806834 for this Coil Configuration! The same is true for Raymond Kromrey, Patent: 3374376