"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 |
| 4908072 | In-process formation of hard surface layer on Ti/Ti alloy having high resistance A process for producing a titanium material with excellent corrosion resistance, which comprises first applying a degree of cold working of 10% or more of the total working reduction while causing an oil to exist on the surface of the titanium material du... | 03/13/1990 |