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 |
| 7102489 | Image forming apparatus and control method thereof An image forming apparatus has a first detector for detecting that a consumption article has reached its life, a second detector for detecting that the consumption article has reached a certain timing before its life, a third detector for detecting an application of... | 09/05/2006 |
| 4173087 | Changeable printed alphanumeric display module A changeable printed alphanumeric display module is disclosed for displaying one character at a time in a viewing window. Each tape of a set of tapes is printed on both front and back surfaces with character segments and is connected between a driving rol... | 11/06/1979 |
| 4067006 | Changeable alphanumeric sign with opaque tape display forming segmented characters and words A changeable alphanumeric sign with printed characters is disclosed. The sign is universally changeable in the sense that any combination of alphanumeric characters may be displayed by selectively positioning a set of display tapes in each character windo... | 01/03/1978 |
| 4064502 | Positioning control system for alphanumeric displays A destination sign for buses is disclosed with an automatic positioning system for a plurality of sign modules. The sign is made up of plural modules, each of which is capable of displaying any one of a set of alphanumeric characters. The display of a mod... | 12/20/1977 |
