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 |
| 3963879 | Telephone dial assembly There is disclosed herein an improved dial assembly suitably adapted to provide an expanded capability for a touch-tone telephone system or to replace existing rotary dial assemblies in various equipment manufacturers' subsets with a touch-tone like assem... | 06/15/1976 |
| 3932707 | Electric impulse transmitters for telephone instruments An electric circuit in an electric impulse transmitter which is responsive to the cessation of line current, except during loop-break impulses, to provide a clearing signal for storage circuits of said impulse transmitter.... | 01/13/1976 |
