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Folding Spiral Stairs Patent Print Patent Title: Improvement In Folding Spiral Stairs Inventor Name: Benjamin F. Card Year Issued:...read more
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Folding Spiral Stairs Patent Print Patent Title: Improvement In Folding Spiral Stairs Inventor Name: Benjamin F. Card Year Issued: April 8 1879 Item Number: 15172 Reprint of original Patent Patent is printed on premium acid-free heavyweigh...