04836501 is referenced by 18 patents and cites 5 patents.

A structure leveling device designed primarily to be utilized for recreational vehicles which is constructed of an integral plastic member having an upper surface which is divided into a plurality of levels of different heights. This structure leveling device is constructed in a manner to safely support the weight of a vehicle. Also, the device is constructed to facilitate movement of a vehicle wheel onto the different levels. Also, the upper surface of each of the levels includes a roughened anti-skid surface.

Title
Structure leveling device
Application Number
7/215392
Publication Number
4836501
Application Date
July 5, 1988
Publication Date
June 6, 1989
Inventor
William F Baer
1509 N. Darcy St., Simi Valley, 93065
CA, US
Agent
Jack C Munro
IPC
E02C 3/00
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