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File:Johan Boegershausen Patent.jpg

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Summary

Description
English: Unknown device
Date
Source Great grandfather's papers
Author Johan Boegershausen

Licensing

Public domain

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Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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inception

1 January 1900Gregorian

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Date/TimeThumbnailDimensionsUserComment
current03:04, 12 July 2011Thumbnail for version as of 03:04, 12 July 20111,200 × 1,936 (682 KB)FAHansson

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