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Class Information
Number: 33/488
Name: Geometrical instruments > Straightedge type > Rules > With attachment > Index > Optical (e.g., magnifying)
Description: Subject matter provided with means on the straightedge to enlarge or emphasize the indicia on the straightedge.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6961174 |
Reflectometer and method for manufacturing a reflectometer |
Nov. 1, 2005 |
| 6935033 |
Measuring instrument for establishing the angle of tilt of a lens mounting rim of a spectacles frame |
Aug. 30, 2005 |
| 6919517 |
Beam scale with user friendly features |
Jul. 19, 2005 |
| 6598311 |
Tape measure and accessories |
Jul. 29, 2003 |
| 6262839 |
Optical unit for image projection and tool incorporating same |
Jul. 17, 2001 |
| 6141147 |
Optical unit for image projection and tool incorporating same |
Oct. 31, 2000 |
| 5873171 |
Ruler assembly |
Feb. 23, 1999 |
| 5423128 |
Cigarette filter rod minimum point gauge |
Jun. 13, 1995 |
| 5317813 |
Carpentry measuring tool |
Jun. 7, 1994 |
| 5033200 |
Scientific ruler |
Jul. 23, 1991 |
| 4835830 |
Method of manufacturing an embodiment of measure |
Jun. 6, 1989 |
| 4793049 |
Method of manufacturing and embodiment of measure |
Dec. 27, 1988 |
| 4757616 |
Ruler with magnifying cursor |
Jul. 19, 1988 |
| 4707928 |
Vari-scale |
Nov. 24, 1987 |
| 4531303 |
Prismatic straightedge |
Jul. 30, 1985 |
| 4439928 |
Drafting instrument |
Apr. 3, 1984 |
| 4331381 |
Magnifying device |
May. 25, 1982 |
| 4324050 |
Scale magnifier |
Apr. 13, 1982 |
| 4316330 |
Magnifying device for use with a triangular rule |
Feb. 23, 1982 |
| 4314408 |
Combination drafting instrument including rotatable scales, compass assembly and straight edge magnifier |
Feb. 9, 1982 |
| 4259784 |
Magnified graphical copier |
Apr. 7, 1981 |
| 4233741 |
Map reading device |
Nov. 18, 1980 |
| 4197649 |
Linear marking device |
Apr. 15, 1980 |
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