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 |
| 4775027 | Seismic sound source The volumetric capacity of the firing chamber of an air gun is discretely quantized by mounting unit-volume inserts interiorly of the firing chamber.... | 10/04/1988 |
| 4703875 | Low mass piston for aerosol container An injection-molded piston for an aerosol container has a face portion for contacting and exerting pressure on material to be dispensed, and a thin, flexible skirt depending axially from and circumscribing the face portion for forming an effective seal ag... | 11/03/1987 |
| 4696223 | Pneumatic pressure actuator A pneumatic pressure actuator including a cylinder assemblage having a pair of metallic cylinder heads and a fiberglass cylinder casing held together by a plurality of tie bolts and nuts. A piston and piston rod reciprocally movable within the cylinder as... | 09/29/1987 |
