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 |
| 6408527 | Scoring tool A scoring tool that is especially useful for scoring relatively flat and rigid materials, such as siding materials that are used as exterior trim on buildings, includes two scoring members that engage opposite sides of the sheet of material to provide a s... | 06/25/2002 |
| 5165175 | Reverse image drawing apparatus A mirror image apparatus for use with a pantograph for drawing, engraving, milling, and similar applications wherein tracing and creating a mirror or reverse image is required. The apparatus is characterized by broadly having a stylus which operates betwe... | 11/24/1992 |
