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Class Information
Number: 33/413
Name: Geometrical instruments > Straightedge type > Cord type
Description: Subject matter wherein the straightedge is a flexible line connected at one end to a support.










Sub-classes under this class:

Class Number Class Name Patents
33/414 With chalking feature 104


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8261460 Line holders for masonry work and the like Sep. 11, 2012
8104188 Suspended-ceiling grid control lines and grid components holders Jan. 31, 2012
8033029 Multi-reel marking apparatus Oct. 11, 2011
7739805 Snap line and method Jun. 22, 2010
7690125 Construction layout tool Apr. 6, 2010
7594336 Line anchor Sep. 29, 2009
7513053 Chalk line anchoring device Apr. 7, 2009
7497023 Offset line alignment tool Mar. 3, 2009
7367130 Snap line and method May. 6, 2008
7299558 Line marker Nov. 27, 2007
6990741 Door frame alignment method system Jan. 31, 2006
6957495 Spring lock spring line chalk box Oct. 25, 2005
6898861 String line tool and sheaths therefor May. 31, 2005
6880261 Flexible and collapsible construction geometry tool Apr. 19, 2005
6829836 Material dispensing apparatus with line level Dec. 14, 2004
6779275 Cotton swab line marking means Aug. 24, 2004
6745485 Chalk line device Jun. 8, 2004
6622393 Combined string line anchor and plumb bob Sep. 23, 2003
6581295 Material dispensing apparatus with line level Jun. 24, 2003
6434843 Dual chalk line device Aug. 20, 2002
6421926 Stringline guide system Jul. 23, 2002
6360445 String line weight Mar. 26, 2002
6212782 Building line layout device Apr. 10, 2001
6167632 Dual chalk line device Jan. 2, 2001
6141880 Tool for layout of rapid development antenna array Nov. 7, 2000
6082014 Chalk line end Jul. 4, 2000
6016609 Eze glide fish tape reel assembly Jan. 25, 2000
5937532 Releasable hook Aug. 17, 1999
5848476 Manual clamping device for measuring railway track alignment and profile Dec. 15, 1998
5822874 Automatically retracting chalk line marking tool Oct. 20, 1998
5778546 Construction alignment apparatus and method Jul. 14, 1998
5720113 Apparatus designed for use as both a string line anchoring device and as a plumb bob Feb. 24, 1998
5704131 Adjustable plumb bob and line capable of automatic braking and retraction Jan. 6, 1998
5657548 Support for measuring cord Aug. 19, 1997
5603717 Method and apparatus for simplifying total hip arthroplasty Feb. 18, 1997
5586394 Self-contained plumb bob and ink line marker with line capable of automatic braking and retraction Dec. 24, 1996
5465494 Tool for marking chalk lines and plumb lines Nov. 14, 1995
5207000 Method and apparatus useful for determining an angle between a virtual optical axis and a planar surface May. 4, 1993
5193288 Apparatus and method for measuring automotive damage and disalignment Mar. 16, 1993
5107595 Accu-square marking system Apr. 28, 1992
5068970 Apparatus for facilitating roadway grade measurements Dec. 3, 1991
5022158 Wall marking layout device Jun. 11, 1991
4958439 Method and device for aligning vehicle frame Sep. 25, 1990
4932134 Adjustable foundation locating device Jun. 12, 1990
4921507 Layout device May. 1, 1990
4916823 Apparatus for facilitating roadway grade measurements Apr. 17, 1990
4669195 Guide line angle indicator Jun. 2, 1987
4662078 Construction string reel May. 5, 1987
4565005 Right-angle index device Jan. 21, 1986
4561189 Chalking line holder Dec. 31, 1985

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