Michael K. Edwards wrote:
As far as I can tell, the only mechanism for conveying such an implied license is an implied contract, and when there is a written agreement involved, a court will only find an implied license as an implied provision in that agreement. As I wrote before, if anyone can cite legal precedent to the contrary
EFFECTS ASSOCIATES, INC. v. Larry Cohen, et. al.http://www.kentlaw.edu/e-Ukraine/copyright/cases/effects_v_cohen.html perhaps.