One who conceives and either personally or through someone else reduces the invention to practice. The conception of an invention is complete if the inventor is able to make a disclosure that would enable someone skilled in the art to make the invention without extensive research or experimentation. Someone who constructs the invention based on the inventor’s conception or who merely assists in the reduction to practice of an invention is not an inventor. Failure to name the correct inventors can result in invalidation of the patent. It is the obligation of all inventors to adequately document their inventive contributions in laboratory notebooks. Inventorship is distinct from authorship and ownership.