Openwork; e.g., truss, trellis, grille, screen, frame, or rebar chair > Spacer-positioner; e.g., rebar chair > Penetrator with limiting stop > Hook-type head integral with penetrating leg > Patents

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Class Information
Number: 52/680
Name: Static structures (e.g., buildings) > Openwork; e.g., truss, trellis, grille, screen, frame, or rebar chair > Spacer-positioner; e.g., rebar chair > Penetrator with limiting stop > Hook-type head integral with penetrating leg
Description: Structure comprising a headed end opposite to a penetrating end, which headed end includes a hook-like projection integral with the shank.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
6918222	Fastener for spacing object from substrate	Jul. 19, 2005
6637171	Apparatus and method for reinforcing concrete using rebar isolators	Oct. 28, 2003
5269113	Spacer suited for being embedded in concrete	Dec. 14, 1993
4948943	Flat construction self-supporting floor plate for heatable raised floors	Aug. 14, 1990