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 |
| 4756477 | Plate for supporting railway rails and a track assembly using it An elongate plate, for use in a railway frog or switch to receive two inclined rails which stand on the plate and on another plate like it and are to be anchored thereto, has an elongate hole through it, with the length of the hole being parallel to that ... | 07/12/1988 |
| 4513912 | Holding a railway rail down on a support member To hold a railway rail down on a support member, a device is employed having a first part driven into a vertical hole in the support member, a second part having a sideways projection, part of which lies vertically below a part of the support member, to o... | 04/30/1985 |
| 4454986 | Railroad spike An improved rail fastening assembly composed of a new rail spike and a contact plate member for maintaining a rail in the preset contact with a cross-tie. The assembly of the present invention maintains rail gauge in spite of long and heavy trains.... | 06/19/1984 |
