File:Browns gas bubbler.png

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Brown's Gas Bubbler

Source European Patent Office patent 1475549
Author Yull Brown
(Reusing this file)

It's an image from a patent with no copyright (Swiss patent CH 605005 (A5))

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of Switzerland or the Swiss cantons. It is therefore not protected by copyright by virtue of Art. 5 of the Swiss Copyright Act.

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current17:48, 5 April 2008Thumbnail for version as of 17:48, 5 April 20081,586 × 882 (30 KB)Omegatron (talk | contribs)crop . remove "fig 1" [using an external editor]
07:38, 5 March 2008Thumbnail for version as of 07:38, 5 March 20081,993 × 1,152 (79 KB)Mox83 (talk | contribs){{Information |Description= Brown's Gas Bubbler |Source= [ European Patent Office] |Date= 1977 June 1 |Author= Yull Brown |Permis
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