GUIDE TO AMERICAN BRACE PATENTS 1829-1910 - Ronald W. Pearson, D.O. (1987)
Self-published by the author, Copyright 1987
This booklet represents only the first step in the research of the American patented bit-stock or bit-brace
It is mainly an index of patent numbers, date of the patent, and the name of the patentee
5.5" x 8.5", 36 page staple bound booklet with1 errata page
No issues noted
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