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 |
| 6669158 | Methods and apparatus for suspending fixtures The apparatus of the invention includes an angle bracket with a hole for a fastener and a flange with a hole for coupling a wire to the angle bracket. The flange is arranged to be substantially perpendicular to the axis of the fastener and substantially p... | 12/30/2003 |
| 5599150 | Clevis pin retainer clips A hitch pin for maintaining a clevis pin in a bore including a continuous wire member formed to include a straight portion ending in a constant radius hinge portion. A parallel portion extends from the hinge portion to a constant radius barb portion. The ... | 02/04/1997 |
| 5504978 | Locking clamp assembly A locking clamp assembly includes a circular band of flexible material having, first and second end portions and a series of indentations formed in the outer surface of the band along the length of the band at the first end portion. A housing is mounted o... | 04/09/1996 |
| 5334095 | Rotary coupler with shaft misalignment and overtravel tolerance A mechanical rotary coupler for first and second coral shafts having slotted ends proximate one another, the coupler being formed of an elongated blade of resilient material longitudinally slit and folded on itself transverse to the slit to provide first ... | 08/02/1994 |
| 4775273 | Bistable shaft retaining element A positionally bistable domed annular disc includes a projection which engages a transverse through hole or a recess in a shaft to be retained. The disc fits concentrically about the shaft and is concave in different directions when in its two stable posi... | 10/04/1988 |
