"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 |
| 7458386 | Manual gas valve with natural/LP gas conversion capability The invention relates to a manual gas valve for use with either LP gas or natural gas operation with the purpose of solving the technical dilemma that the existing gas valve cannot be converted conveniently for use with different gases having different heating value... | 12/02/2008 |