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 |
| 5642257 | Attaching/detaching structure for a keyboard module in an information processing equipment An attaching/detaching structure for a keyboard module in an information processing equipment for easily mounting, removing and exchanging a keyboard module in a main body of the information processing equipment. For mounting the keyboard module on the bo... | 06/24/1997 |
| 4621334 | Personal identification apparatus A method and apparatus is disclosed for verifying whether a particular individual is a member of a predetermined group of authorized individuals. The subject apparatus is particularly suited for controlling access to a secure resource such as a computer n... | 11/04/1986 |
| 4027763 | Keyboard for office machines A keyboard for a typewriter, teleprinter, calculator and similar office machines comprises a series of keys, a series of setting elements selectable by the keys and a group of code bars. A setting spring moves a common setting member which positions the s... | 06/07/1977 |
| 4003087 | Mechanism for use in magnetic tape recorder/player A record and a play keys of a magnetic tape recorder/player are depressed in order to set the recorder/player in its recording mode, and they are locked in their depressed positions by means of a first locking plate. In the above, the record key is furthe... | 01/11/1977 |
