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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. 34

1 The pat­ent ap­plic­ant or the pro­pri­et­or of the pat­ent may grant third parties the right to use the in­ven­tion (grant of li­cences).

2 Where the pat­ent ap­plic­a­tion or the pat­ent is owned by two or more per­sons, a li­cence may not be gran­ted without the con­sent of all en­titled per­sons.

3 Li­cences of third parties not re­cor­ded in the Pat­ent Re­gister are in­val­id against per­sons who have ac­quired in good faith the rights to the pat­ent.