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 |
| 7063025 | Table with foldable legs A table may include a table top, a frame and one or more legs. The legs are preferably pivotally attached to the frame by brackets and the brackets may be rotatable with respect to the table top. The table may also include a drawer and the legs may be sized and conf... | 06/20/2006 |
| 5438723 | Collapsible bed and panel hinge A hospital bed, particulary suitable for home use comprises a plurality of sections which can be releasably connected together, and can be assembled for delivery and storage with head and foot sections, and head and foot boards stacked on a seat section. ... | 08/08/1995 |
| 5090070 | Variable height bed A variable height bed for use in hospitals, extended care facilities and the like. The bed incorporates a base or stationary frame and an elevating frame interconnected and nesting with the stationary frame. The elevating frame has an operative range of a... | 02/25/1992 |
| 4670921 | Portable stretcher which is collapsible into a compact package A portable, collapsible stretcher has frame poles, each of which have a medial joint which folds in one direction and two outer joints which fold in the opposite direction. A wedge is insertable into the medial joint to support the weight when the stretch... | 06/09/1987 |
