Inglis_bridge_patent.png

Description
English: Inglis footbridge from its 1916 patent
Date
Source Military Bridge and the like. US-Patent US1181013A vom 25. April 1916
Author Charles Edward Inglis
Permission
( Reusing this file )
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d) , 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}} .

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25 April 1916 Gregorian