3909996 is referenced by 151 patents and cites 4 patents.

A modular floor mat unit which can be used individually or in combination with adjoining floor mat modules to provide an elevated surface which insulates personnel or materials from the floor surface. The floor mat is a unitary structure comprised of a tread surface integrally attached to the top edges of interconnected flanges which form a support frame. A plurality of drainage openings in the tread surface allow liquids and other substances to be removed from the tread surface to the underlying floor and also ventilate the area beneath the mat. Unitary traction plugs fabricated from a flexible resilient material protrude above and below the floor mat to provide traction and prevent slippage. A plurality of finger elements having inclined top surfaces and detent interlock devices protrude from all sides of the floor mat to provide both an inclined threshold surrounding the mat and means for interlocking adjacent mat modules to form a larger mat area.

Title
Modular floor mat
Application Number
05/531,868
Publication Number
3909996
Application Date
December 12, 1974
Publication Date
October 7, 1975
Inventor
Beall Glenn L
Ettlinger Jr Ralph
Assignee
Economics Laboratory
IPC
E04C 01/10
E04F 15/10
E01C 11/22
E01C 05/20
E01C 05/00
E01C 11/00
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