3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7428149 | Air guide device and computer housing applying the air guide device An air guide device is provided on a side panel of a computer housing, and includes an air guide member and a positioning mechanism. The air guide member includes a first coupling portion and a second coupling portion disposed opposite to the first coupling portion ... | 09/23/2008 |