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A wall panel system includes at least one wall panel, each edge of the panel having a flange. At least one flange, and preferably two opposing flanges, have at least one slot therein. Each slot is mated with a clip having a unique shape that allows the clip to be inserted into the slot and secured t

A wall panel system includes at least one wall panel, each edge of the panel having a flange. At least one flange, and preferably two opposing flanges, have at least one slot therein. Each slot is mated with a clip having a unique shape that allows the clip to be inserted into the slot and secured therein without the use of fasteners and strictly due to its shape. The clip may then be attached to a building surface or intermediary mounting apparatus by a fastener to secure the wall panel thereto.

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1. A clip for securing a wall panel to a building surface, the wall panel having flanges and slots in the flanges for receiving the clips, the clips comprising: a fastening plate having a first edge and a second edge;a first extension extending from said first edge substantially perpendicular to sai

1. A clip for securing a wall panel to a building surface, the wall panel having flanges and slots in the flanges for receiving the clips, the clips comprising: a fastening plate having a first edge and a second edge;a first extension extending from said first edge substantially perpendicular to said fastening plate;a second extension extending from an end of and substantially perpendicular to the first extension toward said second edge of said fastening plate, said second extension extending a distance less than the distance between said first and second edges of said fastening plate; anda flange-engaging portion extending from the end of and substantially perpendicular to said second extension, and including a notch therein;wherein said clip terminates at the second edge of the fastening plate. 2. The clip of claim 1, wherein said fastening plate includes an aperture adapted to receive a fastener therethrough. 3. An attachment system for a wall panel system having wall panels, the attachment system comprising: (a) a plurality of slots in flanges of said wall panels;(b) a plurality of clips mated with said slots, said clips having a fastening plate with a first edge and a second edge, a first extension extending from said first edge substantially perpendicular to said fastening plate, a second extension extending from an end of and substantially perpendicular to said first extension toward said second edge of said fastening plate, and a flange-engaging portion extending from the end of and substantially perpendicular to said second extension, said flange engaging portion contacting an exterior surface of said flange. 4. The attachment system of claim 3, where each said flange-engaging portion of said clip includes a notch therein, said notch defining a first flange engaging portion on a first side of said slot and a second flange engaging portion on a second side of said slot. 5. The attachment system of claim 3, further comprising a plurality of mounting rails attached to a building surface proximate said flanges in said wall panels, where said clips are secured to said mounting rails by a fastener. 6. A wall panel system for attachment to a building surface, the wall panel system comprising (a) a wall panel, having two opposing flanges extending from opposing edges of the panel;(b) at least one slot in each said flanges; and(c) a clip mated with each of said slots, said clips having a fastening plate with a first edge and a second edge, a first extension extending from said first edge substantially perpendicular to said fastening plate, a second extension extending from an end of and substantially perpendicular to said first extension toward said second edge of said fastening plate, and a flange-engaging portion extending from the end of and substantially perpendicular to said second extension;where said wall panel is attached to a surface by said clip mated with said slot in said flange, and where said clip is secured within said slot by virtue of its shape. 7. The wall panel system of claim 6, wherein flanges extend from four edges of the wall panel. 8. The wall panel system of claim 6, wherein said fastening plate includes an aperture therethrough. 9. The wall panel system of claim 8, further comprising a mounting rail attached to the building surface, wherein said clip is secured to said mounting rail by a fastener received in said aperture of said fastening plate. 10. The wall panel system of claim 8, wherein said clips are directly secured to the building surface by a fastener received in said aperture of said fastening plate. 11. The wall panel system of claim 6, wherein said clips are mated with said slots in said flange without the use of a fastener. 12. The wall panel system of claim 6, wherein said slots are wider than said clips to allow for thermal expansion of said wall panel. 13. The wall panel system of claim 12, wherein said wall panel includes at least three slots in each of said flanges, and six clips, each of said clips being mated with one of said slots for securing said wall panel. 14. The wall panel system of claim 13, wherein one of said clips on each of said flanges is secured to said flange with a fastener, and wherein the other of said clips are not secured by a fastener and are able to slide within said slots. 15. The wall panel system of claim 6, wherein a plurality of said wall panels are positioned adjacent to one another and have a gap therebetween. 16. The wall panel system of claim 15, wherein a sealant is provided in said gap between adjacent wall panels. 17. The wall panel system of claim 6, further comprising shims positioned between the building surface and said mounting rail. 18. A wall panel system for attachment to a building surface, the wall panel system comprising (a) a wall panel, having two opposing flanges extending from opposing edges of the panel;(b) at least one pair of slots in each of said flanges; and(c) a clip mated with each of said slots, said clips having a fastening plate with a first edge and a second edge, a first extension extending from said first edge substantially perpendicular to said fastening plate, a second extension extending from an end of and substantially perpendicular to said first extension toward said second edge of said fastening plate, and a flange-engaging portion extending from the end of and substantially perpendicular to said second extension;wherein said flange engaging portion includes a notch therein, said notch defining a first flange engaging portion and a second flange engaging portion, said first and second flange engaging portions being received in said pair of slots in said flange, said clip being secured within said slot by virtue of its shape. 19. The wall panel system of claim 18, wherein said slots in said flange have a width approximately equal to but slightly wider than said first flange engaging portion and said second flange engaging portion to substantially prevent lateral movement of said clip relative to said wall panel. 20. The wall panel system of claim 19, wherein said fastening plate of said clip includes a slot therethrough. 21. The wall panel system of claim 20, further comprising a fastener received in said slot in said fastening plate, said fastener securing said clip to a surface. 22. The wall panel system of claim 21, wherein said slot is wider than the diameter of said fastener allowing for lateral movement of said clip relative to said surface. 23. The wall panel system of claim 18, further comprising a mounting bracket secured to the building surface, said clips being secured to said mounting bracket.