"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 4049129 | Automatic coupling for streetcars and the like An automatic coupling for streetcars and like vehicles comprises a connecting rod pivotally connected to the vehicle and a coupling head pivotally connected to the connecting rod. The coupling head is pivotally disposed in the horizontal plane between an ... | 09/20/1977 |