...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 |
| 5459967 | Adjustable support structure An adjustable support structure is used to support various types of roofs, such as flat, single slope and double slope roofs. The support structure includes a channel shaped post, a load beam assembly connected to the post at about its uppermost end, an a... | 10/24/1995 |
| 5281015 | Storage containers for flat, objects A storage container for a plurality of flat objects is disclosed. The container has apparatus for successively displaying a surface portion of each stored object so as to enable rapid visual scanning. The apparatus rotates successive objects from a first ... | 01/25/1994 |