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 |
| 7251917 | Methods and arrangements for securing fabric An arrangement for securing fabric relative to a framework comprising a framework, a groove in the framework, and a locking spline for being received into the groove in the framework whereby a fabric panel can be retained relative to the framework by an insertion of... | 08/07/2007 |
| 6751919 | Sealing element for expansion joints A sealing element for the recessed seat of an expansion joint in a concrete structure having an elastomeric profile (20) formed by two longitudinal lateral flanges (21) to be fixed to the end edges of the concrete structure (11), and a central p... | 06/22/2004 |
| 6708463 | Method and apparatus for repairing roof covering An assemblage of sheet metal roof covering pieces is utilized in a novel process to recover and stiffen a deteriorated roof without the necessity for extensive removal of the original roof covering, the deteriorated roof structure further stiffened by spaced stiffen... | 03/23/2004 |
| 6622443 | Trim for high pressure laminate and other decorative floor coverings A plastic trim strip for use with high pressure plastic laminate (HPL) modules or other decorative modules used on access flooring. The strip is extruded polyvinyl chloride or other polymeric or other material such as decorative metals such as brass or al... | 09/23/2003 |
| 6564518 | Floor with floor covering, method for laying said floor convering and auxiliary laying device A flooring assembly consists essentially of a stable sub-flooring and a flooring applied thereon over a wide area with at least one floor element for insertion into a gap in the flooring at substantially the same level having different properties than the... | 05/20/2003 |
| 6430884 | Seismic wall and ceiling expansion joint covers A seismic expansion joint cover assembly installed at a motion-absorbing gap between a member A on one side of the gap and a member B on the other side of the gap includes a cover panel spanning the gap and a hinge joining one edge A of the cover panel to... | 08/13/2002 |
| 6170212 | Deck system A deck system including cooperating plastic planks, fastener covers and end caps. Each of the plastic planks has at least one channel in the upper surfaces which extends the length of the plank. Each channel includes at least one pair of opposed ledges. E... | 01/09/2001 |
| 6018924 | Adjustable reveal strip and related method of construction An adjustable reveal is set forth for use in wall construction. In a framed wall, a first and second panel are positioned on the wall to define parallel edges. The spacing between the edges is adjusted so that a sight area is seen between them. A back pan... | 02/01/2000 |
| 5850716 | Flooring system A flooring system is presented. The flooring system is uniquely designed to provide advantageous flooring in work places that are subject to substantial water and/or grease exposure and high traffic. The materials provide advantage with respect to protect... | 12/22/1998 |
| 5737881 | Interlocking roof system An interlocking roof system of tiers of successively higher interlocking panels mounted on base members, each panel being held in place by protrusions fitted into notches in the base member of the next higher tier, the panels of each higher tier having a ... | 04/14/1998 |
| 5718093 | Floor panel joint structure and method of making a wooden building with the same A floor panel joint structure and a method of constructing a wooden building with the same are provided. The method comprises mounting floor panels on the foundation, and, joining a group of structural units to the foundation to produce a first floor stru... | 02/17/1998 |
| 5600971 | Roof plate mounting assembly A roof plate mounting assembly including a base member fixedly mounted to a well-known tight frame, the base member having upward extensions respectively provided at both lateral ends of the base member and locking jaws respectively inwardly bent from the... | 02/11/1997 |
| 5560169 | End cap device An end cap device for dressing room divider paneling and a method of forming the same are disclosed. The end cap device functions as a panel corner trim dressing capable of bending 90 degrees in either direction so as to accommodate various panel end conf... | 10/01/1996 |
| 5092094 | Hingeable expansion joint for covered panels An expansion joint for covered floor panels such as concrete slabs, as well as wall and ceiling panels, has a thickness equal to a covering material on the panels and is surface mounted. An expansion joint member having hingeable lateral sections bridges ... | 03/03/1992 |
| 5020294 | Expansion joint for covered panels An expansion joint for floor panels such as concrete slabs, as well as wall and ceiling panels, has a thickness equal to a covering material on the panels and is surface mounted. An expansion joint member which can be an integral extruded or otherwise for... | 06/04/1991 |
| 4913576 | Molding bracket for covering the end of a panel subject to thermal expansion A molding bracket for covering a seam formed by two end-to-end panels, subject to thermal expansion and contraction. The bracket comprises a longitudinally extending division bar, two pairs of flanges extending in opposite directions from the division bar... | 04/03/1990 |
| 4892322 | Louver gasket A gasket for use on ventilation louvers of buildings. The gasket fits snugly over the sidewall of the ventilation louver and has a circumferential radially inwardly facing concave side surface terminating in a narrow lip which presses against the louver s... | 01/09/1990 |
| 4712338 | Solar-energy-collecting structural unit and solar roof A solar-energy-collector and solar roof. The collector comprises a panel of solar-energy-absorbing material adapted to lie flat on a roof or other supporting surface. The panel has on its undersurface a plurality of projections serving as feet which suppo... | 12/15/1987 |
| 4697398 | Multistoried aseismic building made of modular panels Some improvements are disclosed in an aseismic building comprised of modular panels anchored in a concrete foundation base by means of vertical rods which are connected with said base and extends along the center of a vertical interpanel duct which is def... | 10/06/1987 |
| 4307553 | Seam for joining roofing panels and method therefor The seam joins metal roofing panels of the standing rib type with a water-tight seal. The seam utilizes an integral sealing cap having distal flanges, reentrant flanges and a web which is planar prior to bending. The sealing cap encloses a standing rib jo... | 12/29/1981 |
| 4121396 | Curtain wall construction A curtain wall construction has a plurality of panel units arranged in a checkerboard pattern, each of the panel units including a panel and a frame extending peripherally around the panel. The frames jointly provide a plurality of channels therebetween w... | 10/24/1978 |
| 3977145 | Horizontal siding panel joint support A joint support is adapted to be disposed beneath a joint at adjacent ends of horizontally disposed overlapping siding panels to support same and to assist in preventing the formation of a gap at said joint by virtue of inward buckling or deflection of on... | 08/31/1976 |