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

Class
278
LAND VEHICLES: ANIMAL DRAFT APPLIANCES

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

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Subclass		Title
ClassTitle		===> LAND VEHICLES: ANIMAL DRAFT APPLIANCES
1		MISCELLANEOUS
2		LOAD STARTERS
2.1		STREET CAR
		DRAFT EQUALIZERS
3		. Horse longitudinally aligned
4		. . Two abreast
5		. Horses abreast
6		. . Five-horse type
7		. . . With pole or poles
8		. . Four-horse type
9		. . . With pole or poles
10		. . . . Offset pole
11		. . . . . Three-against-one pull
12		. . . . . Two-against-two pull
13		. . . . . . Lateral evener connection
14		. . Three-horse type
15		. . . With pole or poles
16		. . . . With intermediate evener
17		. . . . . Offset
18		. Two-horse type
19		. . Leverage adjustment
20		. . . Automatic
21		HORSE DETACHERS
22		. Automatic
23		. Combined brake
24		. Traces from singletree
25		. . Traces positively moved
26		. . Movable trace-eye-engaging element
27		. . . Pivoted
28		. . . Sliding pin or rod
29		. Thills or poles from vehicle
30		. . Retracting axle-clip bolts
31		. Doubletree from pole
32		. Singletree from thill or evener
33		POLES AND THILLS
34		. Plural
35		. Special-purpose attachments
36		. Poles
37		. . Agricultural-implement type
38		. . The pole body
39		. . Selective positioned
40		. . Slip tongue
41		. . Axle attached
42		. . . Width adjustment
43		. . Axle hounds attached
44		. Thills
45		. . Two-wheeled vehicles
46		. . Offset draft
47		. . . Selective direct
48		. . Sectional
49		. . Joints and braces
50		. Tips
51		. . Safety neck-yoke retainers
52		THILL COUPLINGS
53		. Resilient
54		. Safety attachments
55		. Plural
56		. Special-position release
57		. . L-head type
58		. . T-head type
59		. . D-head type
60		. Removable transverse pin or bolt
61		. . Antirattling
62		. . . With special pin retainers
63		. . . Resilient
64		. . . . Adjustable
65		. . Special pin retainers
66		. Opposed lug engaging or carrying jaws
67		. L-head type
68		. T-head type
69		. . Cooperating hooks
70		. . . Retainers
71		. . . . Spring
72		. D-head type
73		. . Cooperating hook
74		. . . Retainers
75		. . . . Pivoted
76		. . . . Spring
77		. . Plural-part eye
78		. . . Pivoted jaws
79		. . . . Grapple type
80		. Ball and socket
81		THILL-SUPPORTS
82		. Plural position
83		. Spring latches
84		. Spring
85		. Separate props
86		POLE SUPPORTS
87		. Ground-engaging props
88		. Spring
89		. . Coil
90		WHIFFLETREES
91		. Resilient
92		. Metallic
93		. . Trussed
94		. Trussed
95		. Connections
96		. . Link or clevis
96.1		. . . Resilient
96.2		. . . Adjustable draft line
96.3		. . . . Horizontally
97		. . Resilient
98		. . . To pole or thills
99		. . To pole or thills
100		. . . Pivot bolt
101		. . . . Offset pivot
102		. Trace and whiffletree connections
103		. . Resilient
104		. . Clamp
105		. . Trace-eye-engaging head or end
106		. . . Loop retainers
107		. . . Hook retainers
108		. . . Spring-detent retainers
109		. . . Pivoted button or lug retainers
110		. . . Rotatable-button retainers
111		. . Hooks
112		. . . Trace retaining
113		. . . . Movable keeper
114		. . . . . Snap-hook type
115		. . . . Special-position release
116		. . . . . Opposed lapping hooks
117		. . . Whiffletree fastenings
118		TRACE AND THILL OR POLE CONNECTIONS
119		NECK YOKES
120		. End construction
121		. Pole couplings
122		. . Modified pole and yoke (center)
123		. . . Permanently attached
124		. . With safety devices
125		. . Leather eye or ring
126		HOLDBACKS
127		. Harness attached
128		. . Breech strap
129		. . . Adjustable
130		. . . Automatic release

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Last Modified: 6 October 2000