Robertson screwdriver patent illustration



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English: Page from a patent for the Robertson screw, 1909
Date 1909(1909)
Source Collections Canada
Author Library and Archives Canada, Collections Canada website; from Ken Lamb (1998), P.L., inventor of the Robertson screw, Milton Historical Society. ISBN 0969562969.; original illustration Peter L. Robertson, 1909
(Reusing this file)
Public domain This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1923.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.

The immediate source, the Collections Canada website, notes that this is in the public domain, but includes an apparently non-binding request for conditions of its reuse:] “Library and Archives Canada is identified as the source; You exercise due diligence in ensuring the accuracy of the material reproduced; You do not manipulate and/or modify the material reproduced; and The reproduction is not represented as an official version of the material reproduced or as having been made in affiliation with, or with the endorsement of, Library and Archives Canada.”[1]

Public Domain


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EXIF data:
File name robertson_screwdriver_patent_illustration.jpg
Size, Mbytes 0.089599609375
Mime type image/jpeg
Orientation of image 1
Image resolution in width direction 150
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Software used Adobe Photoshop CS Windows
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