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 |
| 7325803 | Soccer strategy board game A soccer board game having a ferromagnetic surface and games pieces incorporating magnets to maintain the selective positioning of the game pieces during a play turn. The game pieces have a contoured magnetic base depending on the positioned played. The top surface ... | 02/05/2008 |
| 5074557 | Table top football game apparatus A table top football game apparatus includes a table like base having a generally horizontal playing surface. A plurality of elongated parallel slots are provided on the playing surface and a plurality of football player figurines are moveably mounted upo... | 12/24/1991 |
| 4294448 | Game apparatus Disclosed herein is a game apparatus (10) for simulating field games, such as football, with greater realism. The apparatus (10) includes a game board (18) attached to a frame (16) which is supported for pivotal movement about two mutually perpendicular a... | 10/13/1981 |
