Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 6672224 | Railway car truck with a rocker seat A railway car truck having a pair of side frames and a bolster and a transom extending transversely between the side frames. A respective rocker seat is rigidly and permanently attached to each end of the transom and is pivotally supported on a rocker bar... | 01/06/2004 |
| 5802982 | Roll control mechanism for swing motion truck A roll control mechanism for use with a swing motion railway car truck. The control mechanism comprises a transom stop adapted to be attached to the transom of the truck. The transom stop includes a convex cylindrical surface having a tip that is adapted ... | 09/08/1998 |
| 5463964 | Rocker seat connection A railroad car truck or bogie is described as having a pair of sideframes between which are mounted a bolster and either a transom or pair of tie rods which, in turn, are attached to a pair of rocker seats which extend into the sideframes and over open, U... | 11/07/1995 |
| 5081934 | Railway bogie with articulated side frames A rail vehicle guide and support arrangement including a bogie having independent wheels, has a crossbeam fastened to a vehicle body, so as to be perpendicular to the vertical plane containing the longitudinal axis of the vehicle, in proximity to one end ... | 01/21/1992 |
| 5027716 | Stabilized swing-motion truck for railway cars An improved swing-motion truck in which the transom has been replaced by a pair of transverse radius or tie rods for coupling the two rocker seats of the two side frames of the truck. The ends of the rods are directly coupled to anchor brackets formed as ... | 07/02/1991 |
