In US Patent law have provisions for false marketing:-
35 U.S. Code § 292 - False marking
(a) Whoever, without the consent of the patentee, marks upon, or
affixes to, or uses in advertising in connection with anything made,
used, offered for sale, or sold by such person within the United
States, or imported by the person into the United States, the name or
any imitation of the name of the patentee, the patent number, or the
words “patent,” “patentee,” or the like, with the intent of
counterfeiting or imitating the mark of the patentee, or of deceiving
the public and inducing them to believe that the thing was made,
offered for sale, sold, or imported into the United States by or with
the consent of the patentee; or Whoever marks upon, or affixes to, or
uses in advertising in connection with any unpatented article, the
word “patent” or any word or number importing that the same is
patented, for the purpose of deceiving the public; or Whoever marks
upon, or affixes to, or uses in advertising in connection with any
article, the words “patent applied for,” “patent pending,” or any word
importing that an application for patent has been made, when no
application for patent has been made, or if made, is not pending, for
the purpose of deceiving the public— Shall be fined not more than $500
for every such offense. Only the United States may sue for the penalty
authorized by this subsection.
(b) A person who has suffered a competitive injury as a result of a
violation of this section may file a civil action in a district court
of the United States for recovery of damages adequate to compensate
for the injury.
(c) The marking of a product, in a manner described in subsection (a),
with matter relating to a patent that covered that product but has
expired is not a violation of this section.
also see See Clontech Labs. Inc. v. Invitrogen Corp., 406 F.3d 1347, 1352 (Fed.Cir.2005).
But in Europe case is slightly different and not question is raised by IP law on intention to deceive public. I found no promising cases to support false marketing in EU. however i recently came to know that in UK law is in place named "Consumer Protection from Unfair Trading Regulations" Section 5 and 6 , wherein consumer can raise question on deceive under false marketing. It remains doubtful to me how things going to turn