"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 4307669 | Lubrication retaining bearing For use in a railway car truck, a lubrication retaining shim bearing is arranged to be inserted between the railway car center plate and its associated center bowl on the truck bolster. The bearing includes an upper shim for engaging the railway car cente... | 12/29/1981 |