Class 291: TRACK SANDERS ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division

[Manual of Classification, Class Listing]

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

Class
291
TRACK SANDERS

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Subclass		Title
ClassTitle		===> TRACK SANDERS

1		MISCELLANEOUS
2		WHEEL-SLIP CONTROL
3		FLUID DELIVERY
4		. Smoke and cinder
5		. Reversing
6		. Movable trap valve
7		. Gravity conversion
8		. . Bypass
9		. . Horizontal trap axis
10		. . Vertical trap axis
11.1		. Including sand trap
11.2		. . Multiple fluid inlets for delivery pipe
11.3		. . Specified means to alter inlet fluid flow
12		. Blast-nozzle cleaners
13		. Air ports and screens
14		BRAKE-HANDLE CONTROL
15		BRAKE-SYSTEM CONTROL
16		HAND-VALVE CONTROL
17		ALARMS
18		JET IN HOPPER
19		HEATERS
20		. Electric
21		. Steam
22		POWER-ACTUATED
23		. Electric
24		. Fluid
25		SAND FEEDERS
26		. Reversing
27		. Chain
28		. Oscillatory
29		. . Cup
30		. . Hopper
31		. . Spout cutoff
32		. Rotary
33		. Screw
34		. Longitudinal slide
35		. Pivoted slide
36		. Vertical plunger
37		. . Helical guide
38		SAND HOPPERS
39		. Wheel guard
40		. Dome
41		SAND-DELIVERY PIPE
42		. Cleaners
43		. . Fluid
44		. Flexible
45		. Telescopic
46		. Nozzles
47		. . Pivoted
48		SAND SCREENS

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

Last Modified: 6 October 2000

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

Class 291 TRACK SANDERS

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

Class
291
TRACK SANDERS