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 |
| 4332841 | Mold preparation method A method for the preparation of a mold for use in molding high density information discs includes treating the exposed surfaces of the mold with a solvent to remove any foreign matter therefrom. This step is followed by treating the exposed surfaces of th... | 06/01/1982 |
| 4318877 | Video disc molding process An improved apparatus and method of molding a high density information disc which includes maintaining the molding composition at an elevated temperature between the extrusion step and the record pressing step, such that the resultant disc is of improved ... | 03/09/1982 |
| 4299736 | Conductive molding composition and discs therefrom Polyvinyl chloride base molding compositions containing conductive carbon particles which have been treated with a fatty acid chloride have reduced melt viscosities, improved processabilities, and increased electrical conductivities, as well as improved d... | 11/10/1981 |
| 4297393 | Method of applying thin metal deposits to a substrate A method of applying thin metal sensitizing deposits to the exposed silicon areas of a silicon substrate having areas of exposed silicon and silicon oxide, including the steps of immersing the silicon substrate in a basic, aqueous solution containing a me... | 10/27/1981 |
| 4269654 | Silicon nitride and silicon oxide etchant An etching solution for etching composite structures of silicon nitride on silicon oxide on silicon substrates which etches the silicon nitride at a rate equal to or faster than the silicon oxide which comprises concentrated aqueous hydrogen fluoride in a... | 05/26/1981 |
