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).


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Art. 35

1 A pat­ent may not be in­voked against any per­son who, pri­or to the fil­ing or pri­or­ity date of the pat­ent ap­plic­a­tion, was com­mer­cially us­ing the in­ven­tion in good faith in Switzer­land or had made spe­cial pre­par­a­tions for that pur­pose.79

2 Any such per­son un­der para­graph 1 may use the in­ven­tion for the pur­poses of their trade or busi­ness; this right may be trans­ferred or be­queathed only to­geth­er with the trade or busi­ness.

3 A pat­ent has no ef­fect with re­gard to vehicles which are only tem­por­ar­ily in Switzer­land, nor to equip­ment at­tached to these vehicles.

79Amended by No I of the FA of 17 Dec. 1976, in force since 1 Jan. 1978 (AS 1997 1997; BBl 1976 II 1).

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