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 |
| 7318976 | Electrodes with adjustable gas permeability, and method of producing such electrodes An electrode with adjustable gas permeability for electrochemical cells is formed by first and second laminated thin layers. The first serves for determining the overall gas permeability through the thickness of the electrode and conducting electricity. The second i... | 01/15/2008 |
| 7169494 | Fuel cell arrangement and method for operation thereof A fuel cell arrangement comprises a fuel cell current source, peripheral units, a regulated hydrogen source for the fuel cell current source, based on the hydrolysis of a hydride and furthermore an electronic control circuit for controlling the fuel cell current sou... | 01/30/2007 |
| 6808834 | Fuel cell stack with cooling fins and use of expanded graphite in fuel cells For an improved cooling a fuel cell stack (1) with cooling fins extending around the periphery of the stack, the section of the stack has a somewhat longitudinal shape. In detail, the stack comprises: a plurality of fuel cells electrically connected in series... | 10/26/2004 |
