Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7351003 | Vehicle barrier advertisement system A vehicle barrier advertisement system comprising a vehicle parking barrier having a lower face member, a spaced-apart top face member, with a vertical portion extending from the lower face and angularly oriented spaced-apart grooves for insertion of one or more adv... | 04/01/2008 |
| 6976765 | Enclosure for a light source A light source is disposed in a cavity in an enclosure that supports a part of the wall. The enclosure may be disposed substantially within the wall, such that the enclosure does not provide an obstacle to those moving near the wall. Because the enclosure is capable... | 12/20/2005 |
| 6964244 | Tactile identification and direction guidance system and method A tactile identification and direction guidance system and method for blind and otherwise visually impaired persons provides a plurality of substantially identical, longitudinally elongated marker members for support on an underlying walkway in laterally spaced apar... | 11/15/2005 |
| 6231206 | Fiber-optic lighting display The present invention is a fiber-optic floor lighting display which comprises an icon 20, an 30 interface, a light source not shown, and a fiber-optic cable 40. The icon is adapted to be walked on by pedestrian traffic. The icon has a top and a bottom, an... | 05/15/2001 |
| 5984570 | Self energized automatic surface marker A lane marker of the present invention utilizes a housing and filler to support and protect a solar powered energy storage system. The circuitry draws power from solar cells and stores the energy in 5-20 storage capacitors. When the ambient light dims, th... | 11/16/1999 |
| 5771617 | Display device A display device that is incorporated into a building structure includes at least one rigid block composed of a robust grindable composition. The block has at least one light emitting device molded therein, the light emitting device being electrically con... | 06/30/1998 |
| 5671997 | Tamper-resistant fixture for self-luminous radioactive light A tamper-resistant fixture encloses a self-luminous radioactive light in order to prevent removal of the light. The fixture is secured to a mounting surface using tamper-resistant screws and anchors and allows the light to illuminate the immediate surroun... | 09/30/1997 |
| 5582477 | Finned container bases Finned airport junction box container base apparatus and associated installation method are disclosed for an airport edge lighting fixture or an airport sign in an airport runway, taxiway, or other aircraft ground traffic area. Vertical finned vanes are w... | 12/10/1996 |
| 4907361 | Luminous panel for advertising on the ground An illuminated display device for installation in the ground or surface of a pavement and which incorporates a concrete base which houses a light source and which further supports a first fixed frame to which is mounted a thick transparent plate which pla... | 03/13/1990 |
