...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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| Number | Title | Issue Date |
| 5421415 | 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 ... | 06/06/1995 |
| 4265315 | Horseshoe with a continuous wedge-shaped calk A multi-purpose horseshoe which is light in weight and yet strong and durable, the horseshoe including a lightweight, aluminum U-shaped foot portion which has a continuous groove formed along substantially its entire length and continuous steel calk runni... | 05/05/1981 |