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Class Information
Number: 33/18C
Name: Geometrical instruments >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
33/	Indicator of direction of force traversing natural media	0
33/121	Area integrators	26
33/18.1	Scriber	207
33/1R	Miscellaneous	18
33/227	Straight-line light ray type	120
33/2R	Apparel	43
33/300	Indicator of direction of force traversing natural media	16
33/403	Straightedge type	55
33/501	Gauge	85
33/574	Point marker guide	30
33/700	Distance measuring	98
33/DIG.1	Magnetic	160
33/DIG.10	Outlet box	130
33/DIG.11	Materials	10
33/DIG.12	Mechanical expedients	1
33/DIG.13	Wire and strain gauges	54
33/DIG.14	Spline and gear	6
33/DIG.15	Piston position indicator	23
33/DIG.16	Clips and rafters	2
33/DIG.17	Piston ring and bearing race gauging	12
33/DIG.18	Flush pin gauges	1
33/DIG.19	Thermal expansive	14
33/DIG.2	Air	67
33/DIG.20	Tile	37
33/DIG.21	With laser	392
33/DIG.3	Photoelectric	24
33/DIG.4	Interferometer	7
33/DIG.5	Differential transformer	10
33/DIG.6	Dial indicator shock absorber	8
33/DIG.7	Ribbon and wires	4
33/DIG.8	Eccentrics	10
33/DIG.9	Rectangular proportioner	23