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 |
| 4884906 | Serial printer with a single type wheel In a serial printer having a single type wheel, the type wheel is rotatably supported on a rocking frame, which is rockable relatively to a fixed frame, so as to be fixed with respect to the direction of the axis of rotation, and is rotated by means of a ... | 12/05/1989 |
| 4815873 | Initializing method for printing type rings in printer Disclosed is herein an initializing method for printing type rings in a printer having printing type rings, a sensor disc and a detector portion which constitutes a plurality of main detecting portions and an end detecting portion, the printing type rings... | 03/28/1989 |
| 4542998 | Character set printing means utilizing rolling pressure contact for printing A printing apparatus is provided which utilizes rolling pressure contact for printing, and includes a plurality of sets of serially arranged character elements mounted for movement on the external surface of a printing drum. Movement of the sets to place ... | 09/24/1985 |
| 4215943 | Motor driven single element printer A printer has a horizontally movable carrier which supports a print head including a print element on which are disposed type characters in a two dimensional array with the element controllably movable by motors in two degrees of freedom to selectively po... | 08/05/1980 |
| 4095686 | Printer having swingable printing rings Printer having swingable printing rings which are selectively swung against a platen to print a line of selected characters on a paper by selecting a desired character from a plurality of characters provided on the periphery of each printing ring during t... | 06/20/1978 |
| 4019615 | Low inertia impact printing means In a print head, a print wheel comprising the combination of a disk, a plurality of permanently magnetized printing members bearing characters thereon, and electromagnet imparting translation to the printing members by magnetic interaction, and also provi... | 04/26/1977 |
| 3954163 | High speed printer with intermittent print wheel and carriage movement A high-speed printer with a printing wheel with the individual type elements supported by radially extending spokes. Separate servo systems provide intermittent movement for the printing wheel and the carriage carrying the printing wheel.... | 05/04/1976 |
| 3941229 | Serial printing device A serial printing device comprises a type drum rotatably mounted on a carriage which can move parallely to a platen. On the periphery of the type drum are mounted a plurality of character-bearing elements urged against the drum by biasing means. A steppin... | 03/02/1976 |
