Manual of U.S. Patent Classification
as of June 30, 2000

Class
191
ELECTRICITY: TRANSMISSION TO VEHICLES

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> ELECTRICITY: TRANSMISSION TO VEHICLES
1R		MISCELLANEOUS
1A		. Electroplating contact rolls
2		SYSTEMS OF DISTRIBUTION
3		. Convertible, multiple current source
4		. . Internal and external
5		. . Alternating direct
6		. Sectional
7		. Alternating-alternating
8		. Safety cut-out
9		DRAWBRIDGE AND TRANSFER TABLE
10		MAGNETIC INDUCTION
11		VEHICLE IN SERIES
12R		FLEXIBLE EXTENSIONS
12.2R		. Reels
12.4		. . With connector plug or receptacle
12.2A		. . Motor-operated
12S		. Electric iron stands
12C		. Chain protectors
13		PLATE CONDUCTOR
14		SECTIONAL CONDUCTOR
15		. Normally live section
		. Normally dead section
16		. . Magnetomechanical circuit controller
17		. . Magnetic circuit controller
18		. . . Magnet on vehicle
19		. . . . Traveling controller
20		. . Mechanical circuit controller
21		. . . Deformable conductor
22R		CONDUCTORS
23R		. Conduit
24		. . Asymmetric
25		. . Closing
26		. . Draining
27		. . Heated
28		. . Special modifications
23A		. . Overhead conduit conductors
29R		. Third rail
30		. . Protected
31		. . . Closing
32		. . Supports
29DM		. . Conductor made from different materials
33R		. Trolley
34		. . Nonunderrunning
35		. . Guarded
36		. . Special intersections
37		. . Crossings
38		. . Switches
39		. . Section insulators
40		. . Supports
41		. . . Catenary
42		. . . Combined ears and insulator
43		. . . Ears
44		. . . . Splices
44.1		. . Splicers
33PM		. . Cables made of multiple material
22C		. At or below ground surface
22DM		. Rail, made of multiple materials
45R		COLLECTORS
46		. Convertible
47		. Bar
48		. Conduit plow
49		. Third-rail shoe
50		. Trolley
51		. . Common wire passing
52		. . Detachable
53		. . Nonunderrunning
54		. . Indefinite path
55		. . . Bow
56		. . . Roller
57		. . Multiple contact
58		. . . Tandem
59		. . Heads
59.1		. . . Sliding contact
60		. . . Swivel
60.1		. . . . Center bias
60.2		. . . Lateral swing
60.3		. . . Vertical swing
60.4		. . . Axial slide
60.5		. . . Pole couplings
61		. . . Wheel to head contactor
62		. . . Ice clearers or preventers
63		. . . Wheels
63.1		. . . . Quick release
63.2		. . . . Lateral slide
63.3		. . . . Universal mount
63.4		. . . . Slidable pins
63.5		. . . . Pin fasteners
64		. . Poles
65		. . . Frames
66		. . Stands
67		. . . Fluid pressure erector
68		. . . Spring erector
69		. . . . Torsion
70		. . . . Tension or compression
71		. . Rope protectors
72		. . Guards and finders
73		. . . Constantly operative
74		. . . . Fixed
75		. . . . Spiral cam replacer
76		. . . . Star wheel
77		. . . Normally operative
78		. . . . Automatic
79		. . . . Rope-retracted
80		. . . . . Lateral swing
81		. . . . . Longitudinal swing
82		. . . Normally inoperative
83		. . . . Automatic
84		. . . . Rope-actuated
85		. Trolley retrievers
86		. . Erector release
87		. . . Fluid pressure erector
88		. . . Spring erector
89		. . . . Toggle
90		. . Fluid pressure-retracted
91		. . Spring-retracted
92		. . . Rope-actuated
93		. . . . Slack take-up
94		. . Weight-retracted
95		. Nonretracting trolley stops
45A		. Suspended conveyors

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Last Modified: 6 October 2000