08002241 is referenced by 26 patents and cites 15 patents.

The present invention is a unitary piece block formed of polymers (such as polystyrene or other high strength polymer) by a single injection molding step which are assembled into a recreational vehicle leveler. The invention ramp provides four sets of four connectors at a top of a floor plate, which are adapted to interlock in cavity structures formed within a cavity on the underside of the block. Two adjacent blocks are secured together by applying to their top surfaces the securing cavity structure of an underside of a third such block. Such blocks can be stacked in an interlocking manner to reduce storage space.

Title
Half block for multi-level interlocking blocks
Application Number
12/206141
Publication Number
8002241 (B1)
Application Date
September 8, 2008
Publication Date
August 23, 2011
Inventor
Anne Shaw
San Gabriel
CA, US
IPC
B66F 7/24
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