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 |
| 5538573 | Automatic valve insertion method and apparatus therefor An improved method and apparatus for inserting valves between the front and back panels of inflatable bodies, such as air or helium inflated novelty balloons or air-inflated dunnage bags, is disclosed. The method includes the steps of conveying an upper w... | 07/23/1996 |
