Indicator of direction of force traversing natural media > Patents

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Class Information
Number: 33/300
Name: Geometrical instruments > Indicator of direction of force traversing natural media
Description: Device or method for indicating a direction related to that of some force (e.g., magnetic field, gravity etc.), of the type which will pass through a natural media (e.g., air, earth, water), the media apparently being passive to such passage, and not elsewhere classified.

Sub-classes under this class:

Class Number	Class Name	Patents
33/347	Attaching means (i.e., adhesive, magnetic or vacuum viewing aid)	55
33/304	Borehole direction or inclination	142
33/354	Combined	61
33/351	Diverse directional indicator	9
33/316	Gyromagnetic compass	17
33/318	Gyroscopically controlled or stabilized	63
33/365	Level or plumb, terrestrial gravitation responsive	96
33/	Level or plumb, terrestrial gravitation responsive	0
33/355R	Magnetic field responsive	167
33/301	Process	17
33/338	Railway rail spacing and inclination	30
33/333	Structurally installed including relation to feature thereof	84
33/315	Thermally sensitive	5
33/335	Vehicle running gear, or headlight, inclination	36
33/343	With angle or shape determination	24
33/339	With cord-type straight-line guide or holder therefor	24
33/344	With damper or governor for sensor	14
33/342	With independent linear measurement	16
33/332	With marker	14
33/340	With measurement in plural directions or of shape	7
33/349	With preselected direction indicator	30
33/350	With protector or shock absorber	7
33/331	With recorder	1
33/348	With viewing aid (i.e., illuminator or illumination director)	52

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7302762	Plate type capacitive sensor for five-dimensional displacement measurement	Dec. 4, 2007
6785975	Accelerometer augmented precision compass	Sep. 7, 2004
6230415	Electric compass	May. 15, 2001
6068394	Method and apparatus for providing dynamic data during drilling	May. 30, 2000
6047237	Compass precalibration method	Apr. 4, 2000
5983166	Structure measurement system	Nov. 9, 1999
5778545	Magnetically damped azimuth resolver	Jul. 14, 1998
5265470	Tunnel effect measuring systems and particle detectors	Nov. 30, 1993
4706389	Attitude displacement measurement apparatus	Nov. 17, 1987
4416066	Arrangement for orientation during journeys in land vehicles	Nov. 22, 1983
4393709	Direction detection apparatus	Jul. 19, 1983
4218828	Device for measuring the tightening angle on a wrench	Aug. 26, 1980
4214374	Method of and apparatus for measuring the deviation of the center axis of bore holes and trenches relative to the design vertical center axis thereof	Jul. 29, 1980
4138614	JFET switch circuit	Feb. 6, 1979
3938258	Vertical reference device	Feb. 17, 1976