The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 6776568 | Treatment of waste materials Apparatus suitable for use in the treatment of waste and/or organic materials which includes a main body having a treatment chamber therein having a base which when the apparatus is in a harvesting mode is arranged with a space there below. The base includes a plura... | 08/17/2004 |
| 5271704 | Broaching device for a silo A broaching device for a silo is comprised of a rotor and at least one broaching arm connected to the rotor. The broaching arm comprises leaf springs that are stacked on top one another to form a leaf spring packet. The broaching arm further comprises bra... | 12/21/1993 |
| 4975013 | Bottom discharge apparatus for storage vessel A bottom discharge system for upright storage vessels adapted to contain solid, particulate and/or fibrous materials includes a flail chain type unloader for dislodging the material to be discharged including a rotary shaft extending upwardly through a ce... | 12/04/1990 |
| 4957404 | Flail chain unloader for particulate material A flail chain unloader for discharging particulate material from a lower output of an upright storage vessel includes a rotating shaft extending upwardly of the central portion of the vessel above the outlet and flail chains secured to the shaft at differ... | 09/18/1990 |
| 4620795 | Fluidizing device for solid particulates A flexible whip or a system of whips with novel attachments is suspended in a hopper and is caused to impact against fibrous and irregularly shaped particulates in the hopper to fluidize the particulates and facilitate the flow of the particulates through... | 11/04/1986 |
| 4599029 | Silage-tunneling apparatus A silage-tunneling apparatus (1) including a skid (2) on which is mounted an electric motor (30) arranged to drive a drive shaft (44) that has its axis arranged horizontally. Inner and outer hinged rigid cutter arms (45) are attached to the drive shaft an... | 07/08/1986 |
| 4571138 | Apparatus for silo clean out An apparatus for cleaning out material which remains within a confined space, such as silos, hoppers and the like, is disclosed. The apparatus includes a power driven device for impacting the material which is hung up within the silo to loosen it and allo... | 02/18/1986 |
| 4444338 | Vessel for the storage of powdered or granular products A vertical discharge duct provided on a storage vessel wall terminates either in a separate duct outlet or in the vessel outlet at the lower end of the discharge hopper. A duct-clearing carriage is displaceable vertically along the entire length of the du... | 04/24/1984 |
| 4079848 | Bottom silo unloader A silo unloader for a bottom unloading type silo having a discharge opening in the bottom wall thereof comprises a housing adapted to be mounted in said opening and including an upper wall having a shaft opening. The shaft is supported on bearings in the ... | 03/21/1978 |
| 4056202 | Bulk discrete fibrous material storage and feeding apparatus Apparatus for bulk discrete fibrous material storage and feeding comprises a bin receptive of a large volume of the bulk discrete fibrous material and having a bottom wall and upright side walls along the opposite sides of the bottom wall. Movable endless... | 11/01/1977 |