File:Patent US311212 1.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:12, 23 May 2018 | ![]() | 1,986 × 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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