...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 |
| 6347447 | Method of manufacturing truck mounted brake beam A truck mounted brake beam including at least a primary beam having a center section and a pair of end sections with guide feet. The center portion may include two opposed channel elements, each having a horizontal base and two vertical walls, joined by f... | 02/19/2002 |
| 6241057 | Hydraulic parking brake lever arrangement for a railroad vehicle braking system A hydraulic parking brake assembly for a railroad vehicle braking system comprising a hydraulic actuator capable of being mounted on or engagable with the braking system and a lever arrangement connected to the hydraulic actuator which moves in accordance... | 06/05/2001 |
| 6155387 | Truck mounted brake beam and method of manufacturing A truck mounted rail brake including at least a primary beam having a center section and a pair of end sections with guide feet. The center portion may include two opposed channel elements, each having a horizontal base and two vertical walls, jointed by ... | 12/05/2000 |
| 5947236 | Truck mounted brake for standard and premium ride trucks A truck mounted rail brake including at least a primary beam having a hollow center section and a pair of end sections with guide feet to be received in the slots of the truck and a brake shoe thereon. The end sections are slidable within the center secti... | 09/07/1999 |