173133 bitmap to vector conversion

I have this attached bitmap logo, and I would like to convert it to any vector format. I tried many automatic converters, but none gave me a nice result. Well, thats what I need: a vector image based on this attached bitmap file. A nice quality, as low curves as it is possible (all automatic converters only gave me nice results with so many uneeded curves, and the vector files were too big) and remember, this is my intelectual property and already registered.