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Summary

Description
English: Patent for a wood pulp grinding machine for paper making, patented by Ashley B. Tower in 1885.
Date
Source Google Patents; US311212A
Author A.B. Tower
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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27 January 1885Gregorian

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Date/TimeThumbnailDimensionsUserComment
current02:12, 23 May 2018Thumbnail for version as of 02:12, 23 May 20181,986 × 3,138 (260 KB)Simtropolitan{{Information |description ={{en|1=Patent for a wood pulp grinding machine for paper making, patented by {{w|Ashley B. Tower}} in 1885.}} |source =[https://patents.google.com/patent/US311212A/en Google Patents; US311212A] |author =A.B. Tower |date =1885-01-27 |permission ={{PD-US-patent-no notice}} }} Category:D. H. & A. B. Tower Category:Pulp and paper industry Category:Patents from the United States

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