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 |
| 5549502 | Polishing apparatus A grinding method and apparatus having a position aligning mechanism to correctly achieve the centering of each work on a work table and locate an orientation flat part of each work at a predetermined position, and a displacing mechanism for reciprocally ... | 08/27/1996 |
