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 |
| 6938739 | Brake head positioner A brake head positioning means for railcar braking systems. The brake head positioning means is comprised of an attachment means that is engageable with a railcar hanger arm for attaching such brake head positioning means to such railcar hanger arm. An extension mea... | 09/06/2005 |
| 5261509 | Brake block for the bolt carrier shaft in automatic fabric spreaders The invention relates to a brake block especially for the roll carrier shaft in fabric tenters which has: two opposite braking blocks (13, 14) carried by two shoes (15, 16) which are pivoted on a support (18) and movable in a scissor action; control membe... | 11/16/1993 |
| 4051924 | Device for mounting brake shoe of brake for bicycle In a brake for bicycles including brake shoes having brake blocks and secured by a threaded fastening member to brake arches so that the brake blocks are engageable with and disengageable from the rim of a wheel, a device for adjustably or shiftably suppo... | 10/04/1977 |
