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In 1848? It most certainly did. First modern patent is probably the system in Florence in the 1400's, but versions of the concept date back to 500BC. First US p
by inflatableDodo 7y ago
In 1848? It most certainly did. First modern patent is probably the system in Florence in the 1400's, but versions of the concept date back to 500BC. First US patent was 1790.