...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 |
| 5096202 | Display system for data assisted bingo game A bingo game computer system includes a central computer unit having a master monitor, a master keyboard, and a plurality of gam monitors coupled thereto. The game monitors are provided in one-to-one correspondents with a number of game participants. Each... | 03/17/1992 |