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 |
| 6686082 | Fuel cell stack A fuel cell stack comprises fuel cell basic units, each of which including a gas diffuser/collector plate serving as an anode, an ion exchange membrane, disposed on top of the gas diffuser/collector plate and an air diffuser/collector plate serving as a c... | 02/03/2004 |
| 6664693 | Fuel cell powered electrical motor The fuel cell powered electrical motor comprises an electrical motor and a plurality of fuel cell stacks. The electrical motor includes a shaft assembly, a stator encircling the shaft assembly, a rotor encircling the stator, a flywheel located perpendicul... | 12/16/2003 |
