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 |
| 7511387 | Method and apparatus for producing energy using air pressure differential An apparatus for generating and a method for creating the apparatus are disclosed. In an embodiment, the apparatus comprises an element (e.g., a mountain) having a conduit formed therein. The conduit has an inlet and an outlet, with the inlet disposed at a first ele... | 03/31/2009 |
| 4622955 | Surgical retractor for dissection of internal mammary artery A surgical retractor is to be mainly used for dissection of the internal mammary artery. It is fixed to the side of the operating bed by a clamp which can be moved over the rail for the desired place. It's pole will be at either side that internal mammary... | 11/18/1986 |
