Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7422246 | Remote pipe coupling system A remote pipe coupling system includes a first pipe, a second pipe and a pipe coupling. The pipe coupling is adapted to couple the first pipe and the second pipe and it has a loose position and a tightened position. A guide is operably connected to the pipe coupling... | 09/09/2008 |
