Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5183119 | Anti-snag plowing system An anti-snag plowing system suitable for clearing mines in the Middle East is disclosed. Advantageously, the plowing system has also been found to be an efficient and effective soil conditioner, making it a useful farming tool as well. The plowing system ... | 02/02/1993 |
| 4921050 | Plant extractor and cultivating apparatus Plant extracting apparatus is provided by the present invention which utilizes spaced pairs of endless belts having adjacent runs which extend from an inlet adjacent the ground towards an elevated outlet above a cutter assembly. The adjacent runs of the b... | 05/01/1990 |
| 4633955 | Digger for root crops A digger for root crops, such as peanuts, includes two or more digger units depended from a frame drafted by a tractor. Each digger unit includes a screw conveyor, a guide pair helically wrapped 180° around the screw conveyor, and a hydraulic motor to ro... | 01/06/1987 |
| 4135580 | Plant extractor A travelling machine for pulling off green plants or stalks from subterraneous potatoes and like tuberous crops. The machine has a pair of endless belts of which two contacting runs together move in a direction opposite to the direction of travel of the m... | 01/23/1979 |
