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 |
| 4081935 | Building structure utilizing precast concrete elements A building structure is disclosed in which precast columns and beam and deck members are used. Upper columns are supported in spaced apart relationship to lower columns by pairs of rods extending from each column respectively and clamped together by clamp... | 04/04/1978 |
| 4081941 | Flexible protective cover sections, assemblies and form system Protective cover sections and sealed assemblies thereof fully enclose structural shapes such as I-beams and the like to protect them against bacterial growth, mildew, corrosion and the like. Each cover section is generally thin-walled, substantially rigid... | 04/04/1978 |
| 4069638 | Structure of lightweight bars and connector means therefore A lightweight bar comprising a hollow, elongated member having channels within and extending along its faces, said member being composed of sheet material formed into the required configuration of the member and having a pair of edges joined together to c... | 01/24/1978 |
| 4007507 | Bridge composed of individual sections assembled by means of an assembling unit A bridge composed of individual sections is assembled by means of an assembling unit whose support elements comprise two lateral beams, preferably lattice girders. The assembling unit includes a main cross beam which is bolted to the end of one of two adj... | 02/15/1977 |
| 4007574 | Structural member and system An elongated structural member of substantially triangular cross-section incorporating either one longitudinally extending continuous passageway of circular cross-section whose center is located at or near the center of the cross-section of the member or ... | 02/15/1977 |
