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 |
| 4812172 | Rotary apparatus and method for removing trim rings from composite cans Rotary apparatus and a related method for removing foreign and undesirable material from composite cans during the manufacturing operation includes a pair of rotatable plates having an axis of rotation and outwardly-extending fingers faced about the perip... | 03/14/1989 |
| 4317249 | Device for cleaning containers An expandable and collapsible device for cleaning the internal surfaces of containers, such as glass coffee containers of the type used with coffee makers, is disclosed. The device includes a plurality of resilient strip elements shaped and arranged with ... | 03/02/1982 |
