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Thomas Edison:
To all whom it may concern, be it known that I, Thomas Alva Edison, submits on this, the 27th day of January, 1880, the application of this abstract to the Patent Office of the United States of America. The unique design of my invention is that of a glass vacuum tube which houses inside a thin cotton thread filament, the two lower ends of which secure respective posts, forming an arch shape. Details and schematic drawings follow exhibiting all aspects of the invention. But its purpose is simple, to give light.
Riportata da il 05/03/2025 alle ore 07:55

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