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 |
| 6990771 | Inertial control system for opening and closing multiple sliding doors in a common direction An access system for a building structure includes an access opening formed in the structure and a horizontally oriented track extending across the opening. Panels are slidably mounted on the track. A pulley—track system opens and closes the panels. The system is ... | 01/31/2006 |
| 6640869 | Storm door with counterbalance A storm door (20) ventilation through a screen (50) by either or both of slidable sashes (92, 93). The storm door may also utilize a flexible member (80) to secure a liner (30, 40, 53, 54) to a side, without the use of mechanical fasteners. Sash weight ba... | 11/04/2003 |
| 5335818 | Cold drink vending mechanism A vending mechanism for a cylindrical article dispenser of a type having a column of stacked cylindrical articles moved along a dispensing pathway by a force, such as by the force of gravity, is disclosed, which has an escapement mechanism which is attach... | 08/09/1994 |
| 4201122 | Snap door vent A vehicle ventilation opening is covered by a dome-shaped cover that has a pair of generally triangular oppositely disposed lateral cover openings extending from an uppermost portion of the cover. A pair of generally triangular shaped and outwardly bowed ... | 05/06/1980 |
| 4201123 | Snap door vent with spring A vehicle ventilation opening is covered by a dome-shaped cover that has a pair of generally triangular oppositely disposed lateral cover openings extending from an uppermost portion of the cover. A pair of generally triangular shaped and outwardly bowed ... | 05/06/1980 |
| 4180183 | Trap door for vending machine An article vending machine, said machine having an article delivery chute, and an article delivery opening at the lower end of such shute, and a door for closing such opening, in which the improvement comprises a chute closure operable to close the chute ... | 12/25/1979 |
