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 |
| 7413391 | Cotter pin A cotter pin includes first and second tines having flat confronting surfaces and curved side surfaces with flat outer surfaces substantially parallel to the flat confronting surfaces thereof. ... | 08/19/2008 |
| 7278693 | Coupling assembly A hub has an inner surface defining a bore centered on an axis, an outer surface surrounding the inner surface, and two slots extending in radially opposite directions from the bore to the outer surface. A shaft is configured to be received in the bore and has a cir... | 10/09/2007 |
| 6966574 | Multi-functional convertible transport cart A multi-functional cart for transporting objects including a frame, a first handle connected to the frame adjacent a first end of the frame, a second handle connected to the frame adjacent a second end of the frame, a first pair of wheels connected to the frame adja... | 11/22/2005 |
| 5120170 | Apparatus for retaining a nut on a spindle The present invention provides an improved system (30) for maintaining the position of a castellated nut (34) on a spindle (31) having an axial bore (33) therethrough. The improved system (30) utilizes chordal bore (36) passing through the spindle (31). A... | 06/09/1992 |
| 4964490 | Pin type disc brake The pin type disc brake in which a guide pin is inserted from a boss hole of a second extension arm of a caliper to a boss hole of a first extension arm thereof, the guide pin has a threaded end to which a nut is screwed, a member for preventing the guide... | 10/23/1990 |
| 4297063 | Telescoping self-retaining safety bolt assembly A self-retaining safety bolt assembly having a headed end, a cylindrical shank, and a pin tail nut with a tubular shank telescoping over the cylindrical shank with means near the headed end to retain the tubular shank on the cylindrical shank in a hole in... | 10/27/1981 |
| 3965954 | Anti-rotational device for bolts and nuts A device for restricting or resisting rotation of an associated bolt or nut, comprising an open topped cage or receptacle having a base portion and side wall portions extending upwardly, adapted to receive a nut or the head of a bolt. Retaining means are ... | 06/29/1976 |
