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Class Information
Number: 33/453
Name: Geometrical instruments > Straightedge type > Plural straightedges, relatively moveable > Triangulation (e.g., solving trigonometric functions)
Description: Subject matter including means for the measurement of triangles on the earth"s surface (e.g., surveying) or broadly for performing any similar trigonometric operation for finding a position or location by means of bearings from two fixed points a known distance apart.

Patents under this class:

Patent Number Title Of Patent Date Issued
7748129 Apparatus and method for measuring the trigonometric cosine and trigonometric sine of an angle Jul. 6, 2010
6941667 Teaching sin and cosine instrument Sep. 13, 2005
6823603 Device for enabling a single user to easily and accurately mark right and oblique angles and method for employing same Nov. 30, 2004
5894671 Compass with angle trisecting capability Apr. 20, 1999
5639966 Machine height measuring method and machine height measuring device for surveying machines Jun. 17, 1997
5142787 Means and method for defining a layout Sep. 1, 1992
5029397 Method of measuring a vehicular frame to determine alignment Jul. 9, 1991
4575943 Right angle measuring apparatus Mar. 18, 1986
4381607 Carpenter's tool May. 3, 1983
4347669 Navigational calculating device Sep. 7, 1982
4270278 Wind vector resolution device Jun. 2, 1981
4208805 Navigational calculating device Jun. 24, 1980

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