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Class Information
Number: 33/409
Name: Geometrical instruments > Straightedge type > Wall guide and plumb (e.g., building construction) > Building is the vertical support > Connected to brick > By line tension only
Description: Subject matter wherein the wall guide is a line which is stretched by a spring-type mechanism from one end of a brick wall portion to another.

Patents under this class:

Patent Number Title Of Patent Date Issued
8595947 Plumb device for constructing brick columns Dec. 3, 2013
8291606 Guide tool and method for laying concrete block Oct. 23, 2012
7779546 Self supporting string line tool Aug. 24, 2010
7673393 Line block Mar. 9, 2010
7409771 Self supporting string line reel-line block tool Aug. 12, 2008
6412184 Masonry line block and corner pole Jul. 2, 2002
6036133 Recoiling string line apparatus Mar. 14, 2000
5711081 Device and method for construction Jan. 27, 1998
5479713 Line block masonry alignment system for use in conjunction with door bucks and a plumb line Jan. 2, 1996
5125162 Brick alignment clips Jun. 30, 1992
5009015 Brick line tool Apr. 23, 1991
5003701 Masonry clip Apr. 2, 1991
4995152 Chalking line retainer Feb. 26, 1991
4329786 Bricklayer's plumb guide May. 18, 1982
4144649 Brick alignment pole Mar. 20, 1979
4031627 Line holders for brick and concrete block laying Jun. 28, 1977

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