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"Fooling around with alternating current is just a waste of time. Nobody will use it, ever."
Thomas Edison ; 1889
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| Number | Title | Issue Date |
| 6604543 | Hose supporting spool device having rotatable coupling A hose supporting spool device includes a spool rotatably secured to a support device for winding a hose, a shaft secured to the support device and having a passage, a block formed on the shaft and having a peripheral slot and one or more grooves communic... | 08/12/2003 |
| 5044674 | Angularly adjustable pipe connector A pipe connector for connecting a pair of conventional, circular cross-section pipes whose axes are generally coplanar but are angled relative to each other, is formed of a pair of identical, but reversely arranged, tubular sections, each having an outer ... | 09/03/1991 |
| 3980324 | Swivelling coupling for fluid This coupling comprises a rotary cylindrical portion which is recessed and an outlet opening whose lower edge is placed level with the lowest point of a surface which is inclined relative to the rotation axis, whereby the said surface is placed adjacent t... | 09/14/1976 |
