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 |
| 5599099 | Material blending apparatus having a pivotally mounted hopper A weigh batch blender including a hopper pivotally mounted within a housing and having two compartments between which ingredient materials which have been individually introduced into the hopper are transferred to blend the ingredient materials as the hop... | 02/04/1997 |
| 5149423 | Apparatus for the purification of waste water with swivelling mixing container An apparatus for purifying waste water by precipitating out foreign material as solids and separating the solids from the purified water comprising a rotatable semi-cylindrical open container and a band filter beneath the container for receiving the conte... | 09/22/1992 |
| 4682705 | Internal lid for a liquid container This invention is concerned with an internal lid or seal for a liquid container, preferably paint in paint cans, that reduces the tendency of the liquid to separate, dry out, form a surface scum, or deteriorate. The internal lid serves as a removable inte... | 07/28/1987 |
| 4560282 | Apparatus for mixing and granulating powdery substances with a sifting device attached by means of a valve closure The present invention is directed to a sifting device that is attached to a granulating apparatus. The sifting device includes a disk valve which can be shut, allowing the sifting device to be cleaned apart from the granulating apparatus, without detachin... | 12/24/1985 |
| 3987651 | Combined oscillating and unidirectional agitator for automatic washer Improved agitation means for use in a clothes washing machine of the type in which an agitator is oscillated by means of a drive mechanism to secure agitation of the clothes. The present invention provides a first agitator element and a second agitator el... | 10/26/1976 |
| 3987652 | Unidirectional agitation accessory for automatic washer An agitator accessory for washing machines having an oscillating vertical-axis agitator, the accessory comprising a sleeve which is securable to the barrel of the agitator in coaxial alignment therewith, the sleeve having a vane means attached thereto. A ... | 10/26/1976 |
