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 |
| 3993340 | Chopping spades A collapsible chopping spade comprises a shaft with a tool joint at one end and a handle joint at the other end so that both the tool and the handle can be folded against the shaft. A unitary locking arrangement is provided for securing the handle in eith... | 11/23/1976 |
| 3981043 | Slidable tool grip A hand grip is slidably disposed on the handle of a tool, of the type normally requiring the use of two hands such as an ax, broom or shovel, for grasping by one of the hands of the user, and for movement between a stop disposed proximate the free end of ... | 09/21/1976 |
| 3979146 | Beach cleaning apparatus Beach cleaning apparatus that includes a generally U-shaped bracket that opens downwardly, a handle attached to the bracket to manually pull the bracket forwardly, an open mesh bag, fastener mechanism for releasably securing the adjacent parts of the mout... | 09/07/1976 |
