Kimmo Huosionmaa We have sometimes forgotten the things, why some things are interesting about investigators and hobbyists. One thing is very sure, and a good way to make people interested in some things just makes some remarkable things out of the pages of history. And then we must realize that there is something if one of the greatest inventors of history is left from the pages, what tells about inventions. When we are thinking about the light bulb, the invention, what has been put in the name of Thomas Edison, and what is becoming the symbol of the inventions and ideas, we always forget something. Edison didn't actually invent that thing alone, he made it with the genius, whose name was Joseph Swann, and that man actually got the idea, that the glass bulb should be pumped empty. The loss of the air made possible that the filament didn't burn cut. But I always wonder, why the light bulb is mentioned invented by Edison alone? In fact, Edison invented many more things, t