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. 11

1 Products that are pro­tec­ted by a pat­ent, or their pack­aging, may be marked as be­ing pat­en­ted with the Fed­er­al Cross and the num­ber of the pat­ent. The Fed­er­al Coun­cil may pre­scribe ad­di­tion­al in­dic­a­tions.38

2 The pro­pri­et­or of the pat­ent may re­quire any pri­or user or any li­censee to af­fix the pat­ent mark on the products man­u­fac­tured by them or on the pack­aging of such products.

3 If the pri­or user or li­censee does not com­ply with the re­quire­ment of the pro­pri­et­or of the pat­ent, he is li­able to the lat­ter for any res­ult­ing losses without pre­ju­dice to the pro­pri­et­or’s right to re­quire the use of the pat­ent mark.

38 Amended by No I of the FA of 17 Feb. 1976, in force since 1 Jan. 1978 (AS 1977 1997; BBl 1976 II 1).

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