...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 |
| 4651675 | Multiple compartment structure A small animal exercise maze comprises a multiple compartment structure formed of a pluralty of wall panels secured removably at their inner ends to a support base and joined together at their outer ends by clips which secure together the outer ends of ad... | 03/24/1987 |