Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4908845 | Audio/telephone communication system for verbally handicapped In one exemplary embodiment, an audio/telephone communication system for verbally handicapped individuals is disclosed that comprises a programmed computer, and a matrix of touch-sensitive contacts carrying an overlay removably attached thereto and symbol... | 03/13/1990 |
| 4785420 | Audio/telephone communication system for verbally handicapped In one exemplary embodiment, an audio/telephone communication system for verbally handicapped individuals is disclosed that comprises a programmed computer, and a matrix of touch-sensitive contacts carrying an overlay removably attached thereto and symbol... | 11/15/1988 |
