Equitable Defenses in Patent Law
In patent law, “unenforceability” can have immense consequences.
At least five equitable doctrines make up the defense of
“unenforceability” as it was codified into the Patent Act in 1952:
laches; estoppel; unclean hands; patent misuse; and according to
some, inequitable conduct. Yet in the seventy years since incorporation
of equitable defenses into the patent statute, the Supreme Court
has not clarified their reach. Indeed, twice in the last four years, the
Supreme Court avoided giving complete guidance on the crucial
questions of whether, and when, such equitable defenses are available
to bar damages in cases brought at law.
Read on SSRN