File:Jordan refiner.jpg

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Description	US Patent 20,277 - Griding and sizing paper pulp
Source	http://pdfpiw.uspto.gov/.piw?docid=20277
Date	May 18, 1858
Author	J. Jordan
Permission (Reusing this file)	See below.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:34, 9 September 2015		1,795 × 2,975 (637 KB)	David Condrey (talk \| contribs)	==Summary== {{Information \|Description = US Patent 20,277 - Griding and sizing paper pulp \|Source = http://pdfpiw.uspto.gov/.piw?docid=20277 \|Date = May 18, 1858 \|Author = J. Jordan }} ==Licensing== {{PD-US-patent}}

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Conical refiner