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 |
| 4656939 | Printer and inker arrangement for marking conveyed articles A marking device is disclosed which is capable of printing on the lower surface of a package as it passes over a conveyor belt. Multiple inking wheels and multiple printer wheels removably mounted on parallel shafts in a slidingly removable unit are descr... | 04/14/1987 |
