File:CH192864, page 6.png

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Description
English: Pigeon camera, patent drawing of invention by Christian Adrian Michel.
Date
Source Swiss patent CH192864
Author Unknown who drew it, Christian Adrian Michel (1912-1980) was the patent applicant

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Public domain
This image is from or of:
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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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Date/TimeThumbnailDimensionsUserComment
current14:54, 22 July 2009Thumbnail for version as of 14:54, 22 July 2009445 × 835 (45 KB)Hans Adler (talk | contribs){{Information |Description={{en|1=Pigeon camera, patent drawing of invention by Christian Adrian Michel.}} |Source=Swiss patent CH192864 |Author=Unknown who drew it, Christian Adrian Michel (1912-1980) was the patent applicant |Date=1937-12-01 |Permission

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