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 |
| 6944981 | Mobile dispensing display, method for conversion of shopping cart into dispensing display and method of advertising and dispensing products A mobile dispensing display, method for conversion of shopping cart into dispensing display and a method of advertising and dispensing products involves the use of a conventional shopping cart. The shopping cart is provided from a store where the promotional activit... | 09/20/2005 |
| 6942088 | Conveyor system for transport of empty luggage carts from remote loading stations to multi-lane retrieval stations and method A system and method for returning empty luggage carts over long distances from a remote collecting station to a retrieval station in a passenger terminal, where they may be retrieved by arriving passengers for the transportation of their luggage to parking lots, cab... | 09/13/2005 |
| 6290025 | Railroad theme restaurant and food delivery system and method of making same A railroad theme restaurant with educational and entertainment aspects is provided, housed in a round building structure, having a model train food delivery system running on a network of model train tracks configured to service numerous seating modules f... | 09/18/2001 |
| 4518073 | Vehicle lock apparatus and method A lock mechanism (12) discriminates between "valid" and "invalid" keys that are mounted to grocery carts (114). A valid key (98) includes a key portion (106) that passes through an ingress template opening (21) and into the lock mechanism (12). The lock m... | 05/21/1985 |
| 4298099 | Merchandise order picking system and work table A merchandise order picking system includes a vertically and horizontally elongated rack having a plurality of vertically-spaced shelves and being supported on a floor surface. The rack has a rear face whereat merchandise is positioned on the shelves and ... | 11/03/1981 |
