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1. Mexico City, to Manuel Fernandez, Photostatic copy of a document signed : 1880 Nov. 25 [1880]

  • Díaz, Porfirio and Fernandez Manuel.
Subjects
1880 11 25, Electricity, and Electricity
Abstract
Granting to Richard Weightman for the term of six years the exclusive privilege to the use of the apparatus invented by him for the production of light by means of electricity.

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