Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7281558 | Run-flat tire with variable rigidity sidewalls A tire includes at least one sidewall support exhibiting a substantially progressive increase in rigidity as the tire sags during depressurization. The support, which is disposed in the substantially median portion of the tire's sidewalls, includes a circumferential... | 10/16/2007 |
| 7096902 | Vacuum cleaner A vacuum cleaner includes a housing and at least one running roller operatively connected to the housing. The roller has a hub, a running ring, a wall connecting the running ring and the hub. The wall has two side surfaces and a curved cross-section between the runn... | 08/29/2006 |
| 6286572 | Shock-absorbing safety wheel for motor vehicles A shock-absorbing safety wheel includes a rim, a hub at the center of the rim and connected by a plurality of spring plates and radial support, and a solid tire slidably mounted on the outer periphery of the rim and secured by a pair of rim shields. It is... | 09/11/2001 |
| 6279630 | Non pneumatic tires A new class of non-pneumatic tires is proposed, comprising an exterior torus and an interior torus and in the space between them a waveform undulating ribbon like structure having a constant wavelength and the undulating direction being perpendicular to t... | 08/28/2001 |
| 5125443 | Spring mounted wheel assembly A wheel assembly is disclosed having a circular rim that lies in and defines a plane of rotation, a pair of opposed hubs spaced outwardly from the plane of rotation along an axis of rotation of the wheel, the axis of rotation bisecting the plane of rotati... | 06/30/1992 |
| 4240483 | Spoked wheel A wheel for lessening rolling resistance and other forces that retard the rolling of the wheel consisting of a circular wheel rim, a hub member positioned concentrically within the wheel rim and a spoke arrangement connecting the wheel rim with the hub me... | 12/23/1980 |
