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 |
| 4516943 | Amusement ride raft A raft for a rapid flow water course amusement ride having a generally circular shaped hull fabricated in two sections with a surrounding floatation bumper and separate redundant floatation material in the bottom of the hull. A multiplicity of inwardly fa... | 05/14/1985 |
| 4429867 | Flotation amusement device A portable amusement device wherein flotation of participants occurs on a continuous basis within flotation devices comprises a plurality of trough defining segments each being formed with double side walls and end walls with the double side walls definin... | 02/07/1984 |
| 3930450 | Boat ride for amusement park A boat ride system for an amusement park, which includes a main channel and an auxiliary channel extending under the main channel and isolated from it except along a narrow slot. A boat for carrying people includes a hull floating in the main channel, a p... | 01/06/1976 |
