Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 5740865 | Horseshoe A horseshoe stock piece and various complementary pieces provide variety of custom features for horseshoes such as heel calk trailers, trailer calks, calk horseshoes and patent shoes. The stock piece is a horseshoe structure with conventional top or hoof ... | 04/21/1998 |
| 5027904 | Racing plate horseshoe system with movable calks A racing plate horseshoe system with movable calks has an arcuate racing plate attachable to a horse's hoof. An elongated groove is provided in the lower surface and has a plurality of spaced-apart threaded holes extending from the upper surface to the gr... | 07/02/1991 |
