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 |
| 7328271 | Method of controlling telephone connections for internet protocol communications A method of controlling telephone connections for internet protocol communications provides a structure for encapsulating a message to be exchanged between an IP phone and an entity within an Ethernet-based PBX, comprising utilizing a Protocol Header and an IP Messa... | 02/05/2008 |
| 7271368 | Electric hair curling apparatus An electric hair curler is disclosed as including a handle; and a heating tube engaged with the handle and having a longitudinal axis, and the heating tube is adapted to be releasably engaged with hair and is operable to heat hair engaged therewith, and the heating ... | 09/18/2007 |
