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 |
| 7382235 | Unit for controlling the operating functions of a cycle A unit of a system for controlling the operating functions of a cycle is able to co-operate functionally with at least one complementary unit by at least one electrical connection. At least one of either the unit and the complementary unit is configured to be select... | 06/03/2008 |
| 6965205 | Light emitting diode based products Various exemplary implementations of light emitting diode (LED) based illumination products and methods are disclosed including, but not limited to, glow sticks, key chains, toys, balls, various game accessories, light bulbs, night lights, wall lights, wall switches... | 11/15/2005 |
| 5504481 | Fail-safe stop light apparatus An apparatus for covering a face of a traffic light with a warning sign as a result of a power failure to the traffic light. A first member is rotatably mounted to one side of the traffic light and a second member is rotatably mounted to the other side of... | 04/02/1996 |
| 5270698 | Emergency signaling device A switching device for flashing an installed light fixture, as for helping emergency response personnel locate a dwelling. A switch housing which is mountable within a conventional junction box encloses a switch having "off", "on", and "flash" positions. ... | 12/14/1993 |
| 4642605 | Power failure responsive warning device A warning device is responsive to the failure of an electric power supply for activation to a warning mode. The warning device includes an arm pivotally mounted to a frame member and latched by an electromagnet in a non-warning mode. In the non-warning mo... | 02/10/1987 |
| 4489308 | Emergency exit indicators A system for identifying emergency exits in a building includes a strobe light which is tethered at an elevated location with respect to the floor of the building. The strobe light is normally held at the elevated position by an electromagnet, which elect... | 12/18/1984 |
