Henry Green applies for another Patent For a level

8/4/1890 |

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Henry Green applied for a patent for improvements he'd made to pocket levels.

Green states that he is a resident of Hartford in this patent application, and he described himself as a citizen of the United States.

Henry Green had been born in England in 1860 and emigrated to Canada before moving to Connecticut.
Green applied for a patent on a spirit level on March 27, 1890.

United States Patent Office, "Spirit Level," Patent No. 450,457, April 14, 1891.

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