Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7140961 | Combine harvester A combine harvester with a rotor housing which is positioned in a lengthwise direction and with an inclined angle towards the horizontal line inside of the combine. To arrange the rotor housing in a favorable way inside of the combine harvester, it is suggested to u... | 11/28/2006 |
| 7108601 | Grain threshing device A grain threshing device (10) comprising a receptacle (12) or receiving a portion of crop head. The receptacle (12) has a plurality of longitudinal ribs (30) on inner surfaces. One or more flexible arm members (28) are arranged on ... | 09/19/2006 |
| 4337782 | Corn and cereal thrasher A corn and cereal thrasher comprises a cylindrical screen in a vertical casing with an annular space between the screen and the casing. A rotor rotatable concentrically inside the screen comprises successively, from the lower end, a helical screw portion ... | 07/06/1982 |
| 4185642 | Thresher A thresher for grain comprising a rotor and a stator disposed one within the other to define an annular tapered threshing space between them, the rotor and stator having interacting surfaces of generally truncated conical form at least one being lined wit... | 01/29/1980 |
