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 |
| 7290360 | Excavation apparatus An excavating apparatus having a prime mover with a longitudinal centerline and a main frame with an engine, a ground drive system and an excavation boom operatively attached thereto wherein the excavation boom has a first end and a second end. The first end of the ... | 11/06/2007 |
| 7152348 | Excavation apparatus An excavating apparatus having a prime mover with a longitudinal centerline and a main frame (30) with an engine, a ground drive system and an excavation boom operatively attached thereto wherein the excavation boom has a sub-frame (112) with a first e... | 12/26/2006 |
| 6565282 | Tractor implement for scarring pavement in paint line removal A tractor implement to grind surface pavement in removing paint lines is mounted on a tractor side and driven by a tractor power take-off. An implement first frame is supported rotatably on a rod extending orthogonally from the tractor. A rotatable tracto... | 05/20/2003 |
| 6425638 | Pavement cutter A pavement cutter that saves construction materials and prevents repaired pavements from subsiding or collapsing includes a first tilting mechanism attached to a front wheel axis as a base for a tilting mechanism where the base chassis tilts around the re... | 07/30/2002 |
| 6244796 | Removable guide attachment apparatus A guide attachment apparatus for guiding a rotary hand tool of the type which includes an outer enclosure, a rotatable collet adapted to retain a bit adapted for removing grout from a work surface or other activity. The guide attachment apparatus includes... | 06/12/2001 |
| 6161635 | Drilling system drive steel A drive steel member for driving engagement with a rotary drilling machine, including a chuck adapter having main body and chuck seating elements and being constructed and arranged in fixed, sealing relation on on one end of the drive steel member.... | 12/19/2000 |
| 5809985 | Self propelled saw A concrete saw is provided having an engine aligned along a longitudinal axis of the saw frame to minimize the width of the saw and provide a more balanced system. A clutch assembly is attached to a forward end of the engine to disengage the saw blade wit... | 09/22/1998 |
| 5775781 | Pavement marking removal tool and method A method for removing pavement marking and a drum unit for use in practicing the method. The drum unit is mounted in a drive unit on a horizontal rotational axis. A plurality of cutting bit holders, known as blocks, are secured to the outer cylindrical su... | 07/07/1998 |
| 5338102 | Method of mining A method of mining includes striking the surface of friable to brittle, essentially homogeneous mineral materials with a plurality of concave-faced cutting tools rotating about a longitudinal axis disposed substantially parallel with the surface of the mi... | 08/16/1994 |
| 5046890 | Road surface treating apparatus A road surface treating apparatus including a wheel-supported framework having forwardly extending arms pivotally carried thereon. The arms have a transversely extending tool bar mounted to their forward ends. A tool-supporting frame is detachably and adj... | 09/10/1991 |
| 4834462 | Cutter for impact-type cutting machine A cutter for an impact-type cutting machine having a cutter shaft which is eccentrically provided on a drive shaft and is adapted to eccentrically rotate around the drive shaft axis. The cutter has an opening therein into which the cutter shaft is inserte... | 05/30/1989 |
| 4714294 | Drum and cutter assembly for a planing machine A cutter subassembly for a concrete planing machine which is comprised of an elongated acrylic plastic tube on which is manually assembled a set of circular multitoothed cutting elements and annular spacers arranged in a predetermined order to provide a d... | 12/22/1987 |
| 4469185 | Cutter wheel for tillage apparatus An improved cutter wheel that is particularly useful with tilling apparatus for sod seeding purposes. The cutter wheel is mounted for rotation by a drive structure that includes a drive shaft. The cutter wheel includes a central disk portion with an outer... | 09/04/1984 |
| 4275928 | Planing apparatus with bridging cutters Planing apparatus is disclosed having a rotatable cutting drum comprising a central, rotatable support, a plurality of secondary supports spaced around the central support and in parallel relationship thereto, and a plurality of apertured cutting members ... | 06/30/1981 |
| 4175788 | Pavement cutting machine A machine for opening the joints and random cracks in pavement preparatory to placement of a filler-sealer material therein. The machine includes an open carriage having an opposed pair of side wheels and a shroud mounted in the carriage intermediate the ... | 11/27/1979 |
