Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 3958795 | Apparatus for mixing materials Apparatus for mixing fluent materials, especially components for foundry molding compositions, affording a pluralities of containers feeding serially one to another or in parallel discharging to a common acceptor, for batch or continuous operations, permi... | 05/25/1976 |
| 3949912 | Dispenser having a stepped mounting cup A glass container is molded with a recessed outlet end having a sharp outer edge and an enlarged lip. The outside surfaces of the lip of the container from a point adjacent the recessed opening are straight in part and convexly shaped in another part and ... | 04/13/1976 |
| 3949911 | Pressurizable container by heat activation Container holding fluid to be dispensed if pressurized by rupturing cartridge containing liquefied gas located within flexible pouch inside the container, preferably by heating the container.... | 04/13/1976 |
