I don't know anything about what 美加净 was talking about, but I know a bit about copy right since I was involved in similar things, and our company lawyer explained that. Copy right protects expression of an idea, but not the idea itself. FZZ had to copy Bernstein's expression for the copyright law to apply in the first place.
In no case does copyright protection for an original work of authorship extend to any idea, procedure, process, system, method of operation, concept, principle, or discovery, regardless of the form in which it is described, explained, illustrated, or embodied in such work.