31 дек 1877 г. - Wallace applies for patent on machine to bend chain links in Indianapolis, IN

Описание:

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

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