Edith L. De Grave, GB189422420A
Improvements in Copy-books for Teaching, Writing, Drawing, and the like.

On March 9, 1895, Edith L. De Grave, a resident of London, was awarded a patent for developing a novel copybook designed to prevent inadvertent errors by concealing the line above.
Date of Application: 20 November 1894
Date of Issuance: 9 March 1895
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