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 |
| 6553886 | Automatic retraction system for ring roller A hide splitting machine according to the invention has two pivot arms, mounted on modified journals at each end of a rubber roller, that are connected to two ring roller swivel arms attached to each end of the ring roller. The ring roller swivel arms con... | 04/29/2003 |
| 4444028 | Machine for splitting skins The machine for splitting skins through their thickness to obtain two sheets, of which one is a flower sheet on the hairy side and the other a crust sheet on the flesh side, comprises the already known elements of annular endless band blade tensioned betw... | 04/24/1984 |
| 4417458 | Pattern matrix for skiving shoe parts In a patterned matrix for use in conjunction with the skiving of shoe parts upon a splitter machine, the pattern matrix being applied contiguous with the intended shoe part for application to the machine, the pattern matrix including along its edge a reli... | 11/29/1983 |
| 4253318 | Machine for trimming skins The present invention concerns a machine for clipping or trimming hides or skins of the type comprising cylinders with blades or the like for the calibration of hides, leather or the like skins, said machine being provided with devices of substantially el... | 03/03/1981 |
| 4210051 | Band knife splitting machine feed roll arrangement A band knife splitting machine with two superposed feed rolls and an endless moving band knife. The two feed rolls are respectively journalled at the ends of two intersecting pivoting levers and the end of the lever for the lower feed roll is pivoted abov... | 07/01/1980 |
