31 dic 1877 año - Wallace applies for patent on 
machine to bend chain links in Indianapolis, IN
Descripción:
 https://www.google.com/books/edition/Official_Gazette_of_the_United_States_Pa/oeh8AAAAMAAJ?hl=en&gbpv=1&dq=%22Wallace+A.+Heald%22&pg=PA497&printsec=frontcover
Filed with William B Conway 
Añadido al timeline:
fecha:
31 dic 1877 año
Ahora mismo
 ~ 147 years ago 
Fotos:
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