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 |
| 7315037 | Infrared identification device An infrared identification device includes a light emitting panel member that receives light from an infrared light source for conduction within the panel member and emission from a light emitting surface area on one side of the panel member, which is relatively eas... | 01/01/2008 |
| 6777701 | Thermal radiation marker Emitter controller including a controller, and a power amplifier, the controller being connected to a power source, the power amplifier being connected to the controller, the power source and to an emitter, the controller providing a pulse sequence to the power ampl... | 08/17/2004 |
| 6598556 | Aerodynamic wind riding antenna ornament The present invention is an aerodynamic wind riding antenna ornament comprising a main body adapted to be rotatably and slidably attached to an antenna mast. The main body has an aerodynamic lifting surface to harness airflow from the movement of a vehicl... | 07/29/2003 |
| 6553285 | Message conveying system for motor vehicles A message conveying system for motor vehicles that allows a person operating a vehicle to display one of a plurality of messages to other motorists including a message display adapted for positioning within a motor vehicle adjacent to a rear window thereo... | 04/22/2003 |
| 5905434 | Vehicle communication device A vehicle communications system having a remote control unit installed in the interior of a vehicle and a display unit located on the exterior of the vehicle. The display unit has an input from the remote control unit and an input from a vehicle interface... | 05/18/1999 |
| 5589814 | Anti-theft vehicle security system Considering the latest vehicle anti-theft systems and anti-theft warning systems that abound today, the theft of vehicles has not been slowed down to any appreciable amount. In fact, the car theft industry lids virtually kept pace with the car manufacturi... | 12/31/1996 |
| 5426414 | Enhanced auxiliary signaling device The enhanced auxiliary signaling device of the present invention includes a housing mounted on the rear of a vehicle with a control unit electrically connected to the vehicle electrical system and to a display panel on the housing to display various alpha... | 06/20/1995 |
| 5010670 | Automobile window display apparatus Automobile window display apparatus which includes a display panel for carrying a message. The panel is pivotally mounted to the rear window molding for movement between a retracted position and a vertical display position in which the message is visible ... | 04/30/1991 |
| 4682146 | Automotive indicator system A rare gas automobile indicator light system employing a single horizontally disposed indicator tube operated to provide braking, parking, emergency flasher and turn indications. The indicator tube is operated at partial intensity for a parking function a... | 07/21/1987 |
| 4471873 | Distress flag kit for motorists A kit for motorists in distress comprises a container which includes one or more furled distress signal flags, a flag staff, including one or more suction cups, journalled on a terminal portion of the staff, and rotatable from an inwardly-directed storage... | 09/18/1984 |
| 4015557 | Vehicle display assembly A display assembly for use on a vehicle such as an automobile arranged to communicate a visual message indicating distress when the automobile or its occupants require aid. A generally U-shaped carrying clip is supportably disposed on an upper margin of a... | 04/05/1977 |
