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X Patents

Fractional X Patents

Reissued X Patents

Early American Patents

Early Canadian Patents


Patent XC-3321: 1869-06-30, Improvements on railway tracks

X Number Date Inventor City Title
XC-3321 1869-06-30 L. Davidson Brantford, ON Canada Improvements on railway tracks


XC patents are Canadian patents issued between 1824 and 1869.

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xc-patents/xc-3321.txt · Last modified: 2019/05/25 00:16 (external edit)