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Class Information
Number: 33/449
Name: Geometrical instruments > Straightedge type > With means for moving straightedge over a surface > By rollers
Description: Subject matter wherein the means for moving the straightedge includes rotatable cylindrical supports.










Patents under this class:

Patent Number Title Of Patent Date Issued
8516708 Rolling ruler Aug. 27, 2013
6247240 Ruler system Jun. 19, 2001
6122834 Combination framing and speed square Sep. 26, 2000
5647135 Drafting instrument with electronically controllable scale Jul. 15, 1997
5628118 Mini-drafting machine May. 13, 1997
5479719 Rolling ruler Jan. 2, 1996
5433012 Rolling rule Jul. 18, 1995
5193284 Multi-purpose drawing ruler Mar. 16, 1993
5174036 Multi-functional ruler Dec. 29, 1992
5172482 Drawing instrument Dec. 22, 1992
5152069 Parallel rule Oct. 6, 1992
5131157 Drafting device Jul. 21, 1992
5050309 Rolling ruler having a retractable and rotatable pivot pin Sep. 24, 1991
RE33654 Drafting device Aug. 6, 1991
4944095 Guiding device for a computer mouse Jul. 31, 1990
4934061 Draughting tables, drawing boards, drawing instruments and analogous apparatus Jun. 19, 1990
4914824 Parallel rule Apr. 10, 1990
4823475 Drafting device Apr. 25, 1989
4732276 Hinged-lid package Mar. 22, 1988
4688334 Apparatus for making perspective drawings Aug. 25, 1987
4670991 Drawing machine Jun. 9, 1987
4586265 Perspective drawing apparatus May. 6, 1986
4577415 Windowed indexed calibrated T-square and precision-lined drafting board having linear edges Mar. 25, 1986
4383375 Drafting apparatus May. 17, 1983
4283861 Plotting device Aug. 18, 1981
4069588 Digitizer Jan. 24, 1978











 
 
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