patent number

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jmellby
Posts: 1
Joined: Sat Dec 23, 2017 4:20 pm

patent number

Post by jmellby » Sat Dec 23, 2017 4:27 pm

I have a document that give the patent number 503 to Joseph Swan W. in 1864 but nothing comes up in my search. Is the number incorrect or is the material too early? thank you


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