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Class Information
Number: 33/376
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Add-on-type reference-surface section
Description: Device including a surface for cooperation with a workpiece to determine a direction thereof, the surface involving several separable parts which cooperate to enlarge or diminish the effective surface by adding on, taking away, or substituting parts.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7281335 |
Carpenter's level |
Oct. 16, 2007 |
| 7086166 |
Spirit level with integrated inclination adjustment mechanism |
Aug. 8, 2006 |
| 6694632 |
Level |
Feb. 24, 2004 |
| 6293023 |
Level |
Sep. 25, 2001 |
| 5870832 |
Frame for gravity-related measurement device |
Feb. 16, 1999 |
| 5806196 |
Method and apparatus for aligning a towed vehicle with a towing vehicle |
Sep. 15, 1998 |
| 5655309 |
Tool for determining true vertical for tubular objects |
Aug. 12, 1997 |
| 5617641 |
Adjustable length level |
Apr. 8, 1997 |
| 5442864 |
Level |
Aug. 22, 1995 |
| 5433011 |
Combination interlocking segmented level |
Jul. 18, 1995 |
| 5408752 |
Plumb tool kit attachable to the ends of a common level, or the like, used to determine vertical alignment |
Apr. 25, 1995 |
| 5398423 |
Straight edge apparatus for laying ceramic tile |
Mar. 21, 1995 |
| 5388338 |
Interlocking screed level |
Feb. 14, 1995 |
| 5353509 |
Multi-purpose T-square and level combination tool |
Oct. 11, 1994 |
| 5245758 |
T-square attachment for carpenter's level |
Sep. 21, 1993 |
| 5233760 |
Angular measuring mechanism |
Aug. 10, 1993 |
| 5103569 |
Multipurpose combination leveling tool |
Apr. 14, 1992 |
| 4989332 |
Measuring apparatus |
Feb. 5, 1991 |
| 4910876 |
Level attachment |
Mar. 27, 1990 |
| 4635414 |
Adjustable door jamb leveler |
Jan. 13, 1987 |
| 4503623 |
Level |
Mar. 12, 1985 |
| 4461090 |
Headlamp adjuster |
Jul. 24, 1984 |
| 4435908 |
Offset, extendable, quick-release plumbness indicating apparatus |
Mar. 13, 1984 |
| 4327501 |
Square adapter for level |
May. 4, 1982 |
| 4229885 |
Structure of vertical and horizontal surveying instrument |
Oct. 28, 1980 |
| 4150492 |
Precision level |
Apr. 24, 1979 |
| 4070764 |
Level and collapsible ruler |
Jan. 31, 1978 |
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