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 |
| 7243926 | Runner sled that is twistable during steering A sled includes a pair of runners that are formed from a single, continuous, hollow plastic pipe. The runners are fixed to a platform at three locations: the rear ends of the runners curve upward and are attached to the rear end of the seat, while intermediate porti... | 07/17/2007 |
| 5980432 | Hopping vehicle A new hopping vehicle for travelling a distance by spring aided hopping. The inventive device includes a ground engaging base, a lever member, and an elongate handle all hingedly coupled together by a hinge member at their proximal ends. A foot platform f... | 11/09/1999 |
| 5320567 | Aquatic rescue device A rescue device for use by an operator on an ice surface and in water. The device has a pair of elongated buoyant bodies which are pivotally connected for movement relative to each other between an operative position in which the bodies are spaced and lie... | 06/14/1994 |
| 5087060 | Rowing sled A snow rowing sled is provided and consists of a frame affixed between and elevated above a pair of parallel spaced apart skis. Drive mechanisms will propel the sled forward by a person sitting on a seat on the frame by manually operating thrust levers wh... | 02/11/1992 |
| 4968046 | Lightweight amphibious water-onto-ice rescue sled Foam is sandwiched between baffles and two sheets of low friction enameled aluminum. The aluminum is bent to form waterproof seams between the sheets along the top edge and small runners along the bottom sheet. The body of the sled is shoulder width and n... | 11/06/1990 |
| 4943051 | Human energy transmission device A propulsion and exercise device transmitting human energy from both the upper and lower body simultaneously. A frame (20) contains a rotatable upwardly extending mast (30) to which a foot engaging structure (38) is attached by linkage (48). A collapsible... | 07/24/1990 |
