Dana-Farber Cancer Institute, Inc. v. Ono Pharmaceutical Co., Ltd., Tasuku Honjo, etc.
To be a joint inventor, one must: 1) contribute in some significant manner to the conception or reduction to practice of the invention, 2) make a contribution to the claimed invention that is not insignificant in quality, when that contribution is measured against the dimension of the full invention, and 3) do more than merely explain to the real inventors well-known concepts and/or the current state of the art.