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 |
| 5710391 | Recoil reducer wad for ammunition Ammunition cartridges are disclosed comprising means for reducing recoil fed to a weapon on discharge of a cartridge. The recoil reducing means comprises non-supportive material between a propellant charge and an end plate of the cartridge in which energy... | 01/20/1998 |
