It seems many US academic institutes co-own patents filed by their employees, and have policies for redistributing the royalty (minus costs) back to the inventor. For example,
- Stanford: 1/3
- MIT: 1/3
- University of California (UC) system: 35%
- State University of New York (SUNY) system: 40%
Are these numbers negotiable? In particular, can the academic institute force a lower proportion for inventor redistribution by making a deal with the inventor?