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Federal Act
on Patents for Inventions
(Patents Act, PatA)1

of 25 June 1954 (Status as of 1 July 2023)

1Amended by No I of the FA of 3 Feb. 1995, in force since 1 Sept. 1995 (AS 1995 2879; BBl 1993 III 706).

Art. 27

1 Where a ground for nullity ap­plies to only a part of the pat­en­ted in­ven­tion, the court shall lim­it the pat­ent ac­cord­ingly.

2 The court shall give the parties an op­por­tun­ity to be heard on the pro­posed new ver­sion of the pat­ent claim; it may also re­quest the opin­ion of the IPI.

3 Art­icle 25 ap­plies by ana­logy.