...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 5603593 | Expansible fixing plug of plastic material An expansible fixing plug, comprising a body part composed of a plastic material and having a leading end and a rear end, the body part having a longitudinal channel extending from the rear end for insertion of a fixing screw and the like. The longitudina... | 02/18/1997 |