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Class Information
Number: 33/403
Name: Geometrical instruments > Straightedge type
Description: Subject matter comprising means having a straight edge, slot, or the like for testing, measuring, fixing, or drawing straight lines.










Sub-classes under this class:

Class Number Class Name Patents
33/430 Base attached 81
33/411 Clapboard marking 9
33/451 Combined with level 207
33/413 Cord type 61
33/415 Multiplane angularly adjustable 17
33/495 Pivot joints 25
33/482 Plural nonadjustable straightedges forming nonright angles 36
33/474 Plural straightedges nonadjustably fixed at right angles (e.g., t-square, triangles, squares) 133
33/452 Plural straightedges, relatively moveable 44
33/483 Rules 74
33/412 Shaft aligning 93
33/429 Square and fixed straightedge 51
33/418 Square and pivoted straightedge 28
33/427 Square and sliding nonpivotal straightedge(s) 69
33/404 Wall guide and plumb (e.g., building construction) 61
33/448 With means for moving straightedge over a surface 13


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8230611 Straight edge clamping device having connection lock Jul. 31, 2012
7853426 Device for automatically determining a category of mail to which a mailpiece delivered to a franking system belongs Dec. 14, 2010
7615302 Fuel cell producing method and apparatus Nov. 10, 2009
7546688 Parallel ruler device Jun. 16, 2009
7484306 Straight edge clamping device Feb. 3, 2009
6049991 Picture hanging position marking tool Apr. 18, 2000
5964041 Guide tool Oct. 12, 1999
5890524 Router table sled Apr. 6, 1999
5771597 Device for connecting the arms of an angle Jun. 30, 1998
5533556 Router guide apparatus Jul. 9, 1996
5533270 Method and apparatus for measuring stairs Jul. 9, 1996
5428900 Sheet scribing jig Jul. 4, 1995
5343625 Portable magnetic drafting board Sep. 6, 1994
5271159 Circular saw guide Dec. 21, 1993
5187873 Students multi-function protractor Feb. 23, 1993
5172484 Angle measuring device for peripheral grinding wheels with tool rests Dec. 22, 1992
5148730 Sawmark guide Sep. 22, 1992
5138759 Cutting guide and method of making Aug. 18, 1992
5121553 Table saw gauge Jun. 16, 1992
5113590 Protractor May. 19, 1992
5086565 Technical drawing apparatus Feb. 11, 1992
5084982 Combined vernier gauge and protractor Feb. 4, 1992
4989335 Wallpaper knife guide Feb. 5, 1991
4944095 Guiding device for a computer mouse Jul. 31, 1990
4934061 Draughting tables, drawing boards, drawing instruments and analogous apparatus Jun. 19, 1990
4924594 Double cut edger May. 15, 1990
4845858 Stud locating tape Jul. 11, 1989
4805315 Free standing squaring tool with open corners Feb. 21, 1989
4791733 Student's multi-function protractor Dec. 20, 1988
4779354 Variable angle protractor Oct. 25, 1988
4734992 Drawing instrument Apr. 5, 1988
4669197 Drawing aid Jun. 2, 1987
4654978 Marking guide for use with metal studs Apr. 7, 1987
4633592 Precision rule Jan. 6, 1987
4596075 Vernier gauge Jun. 24, 1986
4573276 Tool guide Mar. 4, 1986
4570345 Holding and marking fixture for flat sheets Feb. 18, 1986
4535542 Vernier gauge Aug. 20, 1985
4463644 Straight edge guide Aug. 7, 1984
4462168 Variable angle straight edge Jul. 31, 1984
4454654 Navigational angle-measurement device Jun. 19, 1984
4443953 Handle for a drafting instrument Apr. 24, 1984
4438646 Crankshaft journal surface gauge and kit thereof Mar. 27, 1984
4422245 Tripod open throat T-square and drafting board Dec. 27, 1983
4413416 Measuring device Nov. 8, 1983
4409873 Modular straight edge Oct. 18, 1983
4388764 Template guide Jun. 21, 1983
4369583 Plotting device Jan. 25, 1983
4357755 Column pad layout device, anchor bolt layout device, and layout methods Nov. 9, 1982
4233741 Map reading device Nov. 18, 1980

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