Did You Know...
...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 |
| 4955165 | Pipe tapering device A pipe tapering device adapted to receive the outer peripheral marginal end of a tubing or pipe therewithin and to grind a circumferentially extending taper on a marginal end of a pipe. The apparatus is particularly suited for forming a taper on the outer... | 09/11/1990 |
| 4534133 | Machine for superfinishing annular workpieces A machine for superfinishing the inner race surface of annular workpieces such as bearings with two honing stones of different grain sizes held by a common holder arm. Structure is provided for reciprocally arcuately moving the holder arm perpendicularly ... | 08/13/1985 |
