Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 5237761 | Rotary ditcher having ripper blades A rotary ditcher has a flywheel type rotor carrying impeller blades that pick up and throw soil to the side of the rotor as the rotor is advanced into a body of soil in the direction of its axis of rotation. In advance of the rotor are two ripper blades t... | 08/24/1993 |
| 4958449 | Apparatus for covering drilling mud liquids in a surface depression A method and apparatus for covering drilling mud returns in a drilling mud pit. A soil-projecting apparatus which is attachable to the rear of a conventional farm tractor comprises a plurality of scoop-like members connected to a drive shaft member which ... | 09/25/1990 |
