...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 |
| 7690957 | Amphibious vehicle which has elements for forming a floating bridge An amphibious vehicle which has elements, such as caissons, floats, and ramps, arranged on a self-propelled rolling base, oriented essentially parallel to a longitudinal axis of the rolling base, when the vehicle is in a folded configuration for movement on land, an... | 04/06/2010 |
| 7634971 | Convertible vessel A vessel includes an heavy loaded catamaran, one or several movable buoyant roll-on/roll-off platform(s) (3); a moving element is provided for draft variation in heavy deep seas so that the platform(s) (3) may be raised or lowered between the hulls the... | 12/22/2009 |
| 7631612 | Device for modifying the hull of a floating body A device for modifying a hull of a floating body of a floating vehicle or floating bridge, having a base floating body, with an upper surface forming a principal rolling path, and first and second lateral surfaces. On each side of the base floating body, a first mov... | 12/15/2009 |
| 7624670 | Military vehicle comprising a swinging arm A military vehicle having an armed turret and a swinging arm to move this armed turret. The vehicle is equipped with a gripping mechanism apt to attach the armed turret to one end of the swinging arm. This gripping mechanism has one male part connected to the end of... | 12/01/2009 |