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 |
| 5084610 | Alignment and transport roll made of flexible material An alignment and transport roll made of flexible material has a curved cross section and comprises a ring like thicker outer circumferential part. The outer part of the roll 1 is deflected in an alignment direction, by a variable thickness item to be tran... | 01/28/1992 |
| 5005996 | Ribbon cartridge with endless ribbon reinking mechanism A ribbon cartridge for an endless ribbon used in high speed printers, with increased reliability due to fewer parts, is constructed from a molded casing which is rectangular in shape into which are formed a post on which a cylindrical porous ink reservoir... | 04/09/1991 |
| 4853856 | Vehicle motion logger Apparatus and method for logging data corresponding to the motion of a vehicle. Programmable variables in the logger are set when it is connected to a remote indicating device. The logger is then installed in the vehicle and connected to power and motion ... | 08/01/1989 |
