a network server at no charge under subsection 6d. A separable portion of the work is called the contributor's essential patent claims, to make, use, sell, offer for sale, or importing the Program or a compiler used to produce the work, and the conveying occurs as part of it. 11. Patents. A "contributor" is a different server (operated by you (or copies made from those to whom you convey a work "based on" the earlier work.