Holdings: John Henry Johnson patent

John Henry Johnson was an English inventor. This collection includes an original patent, 6 April 1865, for a machine that bores through rock.

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Bibliographic Details
Main Author:	Johnson, J. Henry (John Henry), d. 1900. (Creator)
Collection:	John Henry Johnson Patent
Collection Number:	Am.8112
Format:	Manuscript
Language:	English
Subjects and Genres:	Patents (licenses) > Great Britain
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