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Class Information
Number: 33/493
Name: Geometrical instruments > Straightedge type > Rules > Particular material
Description: Subject matter wherein the straightedge is constructed of some specified type of material.

Patents under this class:

Patent Number Title Of Patent Date Issued
8015723 Device for measuring height Sep. 13, 2011
7621056 Ruler Nov. 24, 2009
7475487 Height recording album Jan. 13, 2009
7401413 Disposable wound measuring device Jul. 22, 2008
7155838 Apparatus for gauging a dimension of an object Jan. 2, 2007
7111408 Folding rule Sep. 26, 2006
7103983 Multiple component and interactive growth chart and method Sep. 12, 2006
7032319 Ruler with anti-slipping member Apr. 25, 2006
6671092 Reflective measuring scale graduation and method for its manufacture Dec. 30, 2003
6349479 Ruler for guiding a blade and for providing shielding protection from the blade for the hand holding the ruler Feb. 26, 2002
6219976 Multi-purpose, positioning-fastening strap Apr. 24, 2001
6163970 Linear encoder with a modular scale and a method of producing same Dec. 26, 2000
5996290 Multi-purpose, positioning-fastening strap Dec. 7, 1999
5943784 Measuring nail Aug. 31, 1999
5842402 Safety device with cutting edge used when cutting fabric and like products Dec. 1, 1998
5653415 Adjustable-height support for shuttering in the building trade Aug. 5, 1997
5531028 Printed sheet measuring device Jul. 2, 1996
5461795 Measuring instrument and method of making same Oct. 31, 1995
5095632 Composite structure unidirectionally stable with respect to thermal and moisture expansion Mar. 17, 1992
5088209 Metrological scale Feb. 18, 1992
4926566 Method of producing a metrological scale and scale produced by such method May. 22, 1990
4679325 Chalk line marking device Jul. 14, 1987
4665623 Illuminated drafting aid May. 19, 1987
4633592 Precision rule Jan. 6, 1987
4339881 Parallel-ruling straightedge Jul. 20, 1982
4312133 T-Square Jan. 26, 1982
4214368 Dipstick for liquid nitrogen Jul. 29, 1980
4155165 Picture mat marking instrument May. 22, 1979
4024831 Transparent ruler having longitudinally positioned colored area for isolating rows of symbols for rapid scanning May. 24, 1977
4005527 Depth gauge Feb. 1, 1977
3934352 Linear measuring instrument Jan. 27, 1976

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