What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 258
Class Title: RAILWAY MAIL DELIVERY
Subclass Subclass
Number Title
1 MISCELLANEOUS
1.2 AIRCRAFT IN FLIGHT
1.4 .To or from another moving vehicle and/or requiring
circular aircraft flight
1.6 .With projector
1.8 .Load exchange
2 SIGNALING FEATURE
3 HAND TOOLS
4 MAGNETIC
5 PROJECTORS
6 .Automatically actuated
7 ..Spring
8 CAR-POSITIONED RECEIVER OR SUPPORT
9 LATERALLY SLIDING RECEIVER OR SUPPORT
10 LONGITUDINALLY EXTENDING AUXILIARY TRACK
11 COMBINED RECEIVER AND SUPPORT
12 .Fork and other receiver
13 ..Retaining feature
14 .Fork receiver only
15 ..Retaining feature
16 ...Impact-operated load release
17 ...Receiver-engaging feature
18 ..Receiver-engaging feature
19 .Impact-operated load release
20 RECEIVERS
21 .Fork
22 ..Retaining feature
23 SUPPORTS
24 .Interconnected arms
25 .Impact-operated load release
26 .Receiver-engaging feature