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 |
| 5526035 | Transaction based interactive television system An interactive television system where interactive information is inserted in the vertical blanking interval of a standard television signal. The signal is received and decoded by a settop decoder which sends the decoded signal via an infrared signal to a... | 06/11/1996 |
| 5519433 | Interactive television security through transaction time stamping A system for providing security on an interactive television system. Two sets of interactive data, with time stamps, are separately sent to a remote location. At the remote location, the time stamps are checked against a remote clock, a time difference be... | 05/21/1996 |
| 5343239 | Transaction based interactive television system An interactive television system where interactive information is inserted in the vertical blanking interval of a standard television signal. The signal is received and decoded by a stetop decoder which sends the decoded signal via an infrared signal to a... | 08/30/1994 |
