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A safety device for a motor vehicle having a door window defined by a retractable transparent panel which is guided into a receiving frame, the safety apparatus comprising a window insert formed of a sheet of material; a window frame including a transparent panel, the window frame having inside and

A safety device for a motor vehicle having a door window defined by a retractable transparent panel which is guided into a receiving frame, the safety apparatus comprising a window insert formed of a sheet of material; a window frame including a transparent panel, the window frame having inside and outside surfaces; a lower mounting bracket for receiving the sheet, with an edge defined to be releasably inserted in the frame; an upper mounting bracket for receiving the sheet, the upper mounting bracket attached to the inside surface of the window frame.

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What is claimed is: 1. A safety device for a motor vehicle having a door window defined by a retractable transparent panel which is guided into a receiving frame, the safety apparatus comprising: a window insert formed of a sheet of material; a window frame including a transparent panel, said windo

What is claimed is: 1. A safety device for a motor vehicle having a door window defined by a retractable transparent panel which is guided into a receiving frame, the safety apparatus comprising: a window insert formed of a sheet of material; a window frame including a transparent panel, said window frame having inside and outside surfaces; a lower mounting bracket for receiving said sheet, with an edge defined to be releasably inserted in said frame; an upper mounting bracket for receiving said sheet, said upper mounting bracket attached to said inside surface of said window frame; wherein said window insert defines a notched edge, and wherein said notched edge defines a region in said window insert which is disposed upon said lower mounting bracket. 2. The safety device of claim 1 wherein said sheet comprises an optically transmissive material. 3. The safety device of claim 1 wherein said transparent panel comprises an optically transmissive material. 4. The safety device of claim 2 wherein said optically transmissive material is selected from the group consisting of glass composites, glass plastic composites or plastic. 5. The safety device of claim 2 wherein said optically transmissive material is selected from the group consisting of optically transmissive polycarbonates, acrylics or plastics. 6. The safety device of claim 1 wherein said window insert is formed from a bullet proof material. 7. The safety device of claim 6 wherein said bullet proof material is selected from the group consisting of glass composite, glass/plastic composite, and plastic. 8. The safety device of claim 1 wherein said window insert includes a fastening receiver. 9. The safety device of claim 1 wherein said lower mounting bracket includes a fastening receiver. 10. The safety device of claim 1 wherein said upper mounting bracket includes a fastening receiver. 11. The safety device of claim 1 wherein said upper mounting bracket for receiving said sheet affixes said sheet to said upper mounting bracket. 12. The safety device of claim 1 wherein said upper mounting bracket includes a plurality of upper mounting brackets.