| http://www.w3.org/ns/prov#value | - Cir. 1998) (noting in a discussion of structural equivalents that ???[t]he question of known interchangeability is not whether both structures serve the same function, but whether it was known that one structure was an equiva- lent of another???); see also id. at 1310 (???[A] finding of a lack of literal infringement for lack of equivalent structure under a means-plus-function limitation may precl
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