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 |
| D523852 | Notebook computer | 06/27/2006 |
| 6836199 | Tuning circuit In order to improve Q of a tuning circuit by using a negative resistance circuit, a tuning circuit wherein a frequency selectivity characteristic and a tuning circuit gain does not vary and are kept constant values even if a tuning frequency is changed, is provided.... | 12/28/2004 |
| 6644172 | Sliding device A semi-spherical shoe 1 includes a semi-spherical surface 1A and a flat end face 1B. The semi-spherical surface 1A comprises a sliding contact region 1a which is disposed in sliding contact with a semi-spherical recess 2B formed in a piston 2, and a lead-... | 11/11/2003 |
| 6298959 | Motion-damping arrangement, in particular for motor vehicles A motion-restraining arrangement is described, which has a motion restrainer, which has a housing that is essentially stationary. It includes a restraining device, and a connecting member movable relative to the housing. The housing can be connected to a ... | 10/09/2001 |
| 6032431 | Device for forming framework of wooden building A device for forming a framework of a wooden building including a steel pipe, screw bar, joint, bolt and joint stick. The steel pipe is tightly inserted in a hole formed at the top edge and/or the bottom edge of a vertical post. The screw bar connects two... | 03/07/2000 |
| 5997004 | Hybrid floating brush seal A hybrid floating brush seal (10) generally includes a brush (30) that encircles a rotating shaft (12). The brush (30) includes a bristle portion (32) that is carried by a holder (34). A self acting film device such as a spiral groove seal (52) is dispose... | 12/07/1999 |
| 5610304 | Pyrimidinyl or pyridinyl sulfonamide substituted compounds Sulfonamide compounds of formula (I) or a pharmacologically acceptable salt thereof: ##STR1## exhibit excellent antitumor activity and low toxicity.... | 03/11/1997 |
