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.
Enter a class/subclass code here to get a list of patent titles. Use
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363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any subclass letters capitalized. Currently Design Patent titles (those in the classes of the form Dxx.yy) are not retreivable.
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