William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 6584627 | Webbed frame for furniture A webbed frame includes a plurality of first and second straps mounted on a frame body to form a net. Each of the first and second straps has two opposite end sections trained on the frame body. A plurality of spaced apart retainers are fixed on the frame... | 07/01/2003 |
| 5903939 | Raised frame support for sofa-sleeper A sofa sleeper foldable sofa bed assembly having pivotally interconnected head, body, intermediate and foot frame sections each including a pair of opposed side rails. The frame sections are extendable to form a bed and foldable to form a sofa seat. The f... | 05/18/1999 |
| 5426796 | Support bar accessory for collapsible bed A removable support accessory (30) is positionable relative to one or more support bars (15, 16) of a bed frame (12) of a collapsible bed (10) to provide a substantially greater support base and more planar bed and seat support planes (23, 82). The suppor... | 06/27/1995 |
| 4754505 | Foldable mattress support with supplemental back spring A mattress is supported on a flexible deck which is surrounded by and connected to a foldable frame. A back section of the frame is movable between a horizontal sleeping position and a vertical seating position. A supplemental back spring is attached to the fr... | 07/05/1988 |
| 4459713 | Double width chaise lounge A chaise lounge includes an adjustable strap extending lengthwise for varying the support provided to a user or users of the chaise lounge. The chaise lounge is sufficiently wide to accommodate two adults either sitting or lying side by side. Diagonal sid... | 07/17/1984 |