is the wording regularly found in numerous US, EP and PCT patent applications, although the only documents I can find are either translations of DE patents or written in English by German applicants/inventors.
special choice (since a certain possibility, the result of which was unforeseeable, was chosen among a great number of possibilities, it is a patentable lucky choice)
http://www.freepatentsonline.com/y2010/0160416.html special choice (if a certain possibility, the result of which was unforeseeable, is chosen among a great number of possibilities, that is a patentable lucky choice)
http://www.sumobrain.com/patents/wipo/Biopsy-device-in-vivo-...Therefore the specified magnesium alloy, among the large number of conceivable materials, represents an unexpectedly lucky choice.
http://www.freepatentsonline.com/y2004/0098108.htmlHere is something else from an originally English-language US patent:
The selection of a specific virus for tumor regression was based on serendipity or trial and error in the above citations.
http://www.freepatentsonline.com/y2008/0057037.html