An Embodiment OF THE EXISTING PATENT LAWS; OR, THE ACT ENTITLED "AN ACT TO PROMOTE THE PROGRESS OF USEFUL ARTS, AND TO REPEAL ALL ACTS AND PARTS OF ACTS HERETOFORE MADE FOR THAT PURPOSE," APPROVED JULY 4th, 1836, AS AMENDED BY SUBSEQUENT ACTS; WITH OTHER MATTER USEFUL TO INVENTORS AND DEALERS IN PATENT RIGHTS

Published by City of Philadelphia, PA, 1861
Condition: Used - Very good Soft cover

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Used - Soft cover

Condition: Used - Very good

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