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Class Information
Number: 33/375
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Relatively movable, coacting, reference-surface sections > Affecting level or plumb indication
Description: Device wherein the members are moveable in such a manner, that an imaginary line between the workpiece contact surfaces thereof will be shifted in its relationship to the level or plumb during such movement.

Patents under this class:

Patent Number Title Of Patent Date Issued
8413343 Extendable plumb and level measuring device and associated usage method Apr. 9, 2013
8407906 Window frame deflection measurement device and method of use Apr. 2, 2013
8152119 Luminaire bracket assembly Apr. 10, 2012
8104187 Window frame deflection measurement device and method of use Jan. 31, 2012
7574812 Pivot plate leveler Aug. 18, 2009
7086166 Spirit level with integrated inclination adjustment mechanism Aug. 8, 2006
6694632 Level Feb. 24, 2004
6658752 Extensible carpenter's level Dec. 9, 2003
6640455 Sliding adjustable track level Nov. 4, 2003
6550152 Adjustable spirit level for tile and cabinet installation Apr. 22, 2003
6427348 Slope block Aug. 6, 2002
6293024 Leveling device Sep. 25, 2001
6293023 Level Sep. 25, 2001
6279240 Extensible carpenter's level Aug. 28, 2001
6178649 Optical calibrating apparatus for emitting datum laser line Jan. 30, 2001
5488777 Utility line angle measurement device Feb. 6, 1996
5438761 Rotatable carpenter's level Aug. 8, 1995
4910876 Level attachment Mar. 27, 1990
4754553 One-man field survey instrument Jul. 5, 1988
4635376 Angle measuring apparatus Jan. 13, 1987
4617820 Level calibrating device Oct. 21, 1986
4607437 Adjustable level Aug. 26, 1986
4543731 Gradient measuring devices Oct. 1, 1985
4255865 Camber aligning tool Mar. 17, 1981
4067117 Grade checking tool Jan. 10, 1978
3947970 Roll alignment gauge Apr. 6, 1976
3939571 Method and apparatus for aiming aircraft visual approach slope indicator Feb. 24, 1976

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