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Class Information
Number: 33/365
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive
Description: Device responsive to terrestrial gravitation and establishing either a horizontal or a vertical direction.










Sub-classes under this class:

Class Number Class Name Patents
33/376 Add-on-type reference-surface section 35
33/368 Arresting means for movable indicator 3
33/366.11 Electrically actuated signal or indicator 126
33/369 Line level type 16
33/377 Liquid type, upper surface utilizing 67
33/391 Pendulum 141
33/367 Plural, similar, separable liquid columns system 63
33/374 Relatively movable, coacting, reference-surface sections 75
33/370 Work, or workman, attaching means 86


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8671582 Tilt indicator Mar. 18, 2014
8646186 Multi-angle levels and plumbing methods Feb. 11, 2014
8640351 Multifunction measuring device Feb. 4, 2014
8615892 Apparatus and methods for level and/or straight edge tools Dec. 31, 2013
8413343 Extendable plumb and level measuring device and associated usage method Apr. 9, 2013
8205347 Loader tool level indicator Jun. 26, 2012
8181354 Inclination position sensor and inclination position sensor manufacturing method May. 22, 2012
8079154 Apparatus and method for measuring curvature of tubes Dec. 20, 2011
8056249 Apparatus and methods for level and/or straight edge tools Nov. 15, 2011
7987607 Inclination sensor Aug. 2, 2011
7937846 Inclination position sensor and inclination position sensor manufacturing method May. 10, 2011
7926194 Indicator, detector, and detection method Apr. 19, 2011
7921573 Monitoring verticality of a sinking caisson Apr. 12, 2011
7908760 Vehicle drive axis alignment device Mar. 22, 2011
7866055 Level provided with impact-absorbing end caps Jan. 11, 2011
7845086 Inclination sensor Dec. 7, 2010
7832112 Vial-mounting structure Nov. 16, 2010
7770298 Securement arrangement for a level end cap Aug. 10, 2010
7748128 Slab doctor level Jul. 6, 2010
7730626 Masonry guiding tool Jun. 8, 2010
7685722 Compact celestial navigation device Mar. 30, 2010
7607235 Apparatus and methods for level and/or straight edge tools Oct. 27, 2009
7603786 Piezoelectric quartz level sensor Oct. 20, 2009
7600324 Level Oct. 13, 2009
7581329 Dynamic percent grade measurement device Sep. 1, 2009
7574812 Pivot plate leveler Aug. 18, 2009
7536797 Spirit level May. 26, 2009
7409772 Apparatus and methods for level and/or straight edge tools Aug. 12, 2008
7377046 Inclination sensor and azimuth measuring apparatus using inclination sensor May. 27, 2008
7360316 Level Apr. 22, 2008
7313871 Archery sight Jan. 1, 2008
7243435 Level device and method of calibrating a level vial Jul. 17, 2007
7228637 Impact-absorbing end caps for levels Jun. 12, 2007
7150107 Structure and method for holding and protecting vials in levels Dec. 19, 2006
7150106 Method of using a level Dec. 19, 2006
7131209 Apparatus for measuring horizontal level of a wafer chuck Nov. 7, 2006
7117606 Pocket-sized leveling tool Oct. 10, 2006
7073270 Impact-absorbing end caps for levels Jul. 11, 2006
6988320 Level Jan. 24, 2006
6976316 Magnetic plumb bob holder Dec. 20, 2005
6941666 Forklift mast position indicator Sep. 13, 2005
6918187 Multi plane plumb level Jul. 19, 2005
6912794 Bricklayer's combination level and plumb Jul. 5, 2005
6877240 Apparatus for indicating correct or faulty back posture Apr. 12, 2005
6792686 Level Sep. 21, 2004
6675490 Level Jan. 13, 2004
6655036 Aid apparatus for level surveying instrument Dec. 2, 2003
6640455 Sliding adjustable track level Nov. 4, 2003
6615500 Door jamb square Sep. 9, 2003
6594912 Electronic plumb indicator for monopoles, survey poles, global positioning antennas and the like Jul. 22, 2003

1 2 3










 
 
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