Image:Heil patent figs.png

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[edit] Summary

Image of figures from British Patent No. 439,457, granted 6th December 1935, based on British application dated 4th March 1935.

This work is in the public domain worldwide. This is because either:

It is a photograph created by the United Kingdom Government taken prior to 1 June 1957; or
It is an engraving or photograph created by the United Kingdom Government and commercially published more than 50 years ago; or
It is an artistic work other than a photograph or engraving which was created by the United Kingdom Government more than 50 years ago.

See Copyright, Crown copyright artistic works and HMSO Email Reply.

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	Date/Time	Dimensions	User	Comment
current	08:14, 28 July 2006	378×508 (20 KB)	Dicklyon (Talk \| contribs)	(Image of figures from British Patent No. 439,457, granted 6th December 1935, based on British application dated 4th March 1935. )