"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 5407015 | Bottom plow and a soil breaking apparatus A soil breaking apparatus for use with a bottom plow comprises a beam pivotally attached by a bolt to the bottom plow; a port arm and a starboard arm fixedly attached to the beam; and a two-way hydraulic cylinder for pivoting the arms and the beams, such ... | 04/18/1995 |
| 5255748 | Terracing attachment assembly for a moldboard plow A terracing attachment assembly is used with a moldboard plow movable in a forward direction across a field. The plow includes a plurality of moldboard plow bottoms supported below the plow frame in a spaced apart and laterally staggered relation along th... | 10/26/1993 |
| 4058169 | Automatically self-steering plow/harrow combination with release and reset mechanism connecting harrow to plow A plow/harrow combination comprising a harrow member extending sidewardly from a plow blade, the harrow teeth having an elongated cross section with the cross-sectional length axis inclined in relationship to the direction of travel, thus creating a compe... | 11/15/1977 |