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Class Number Class Name Patents
402 Binder device releasably engaging aperture or notch of sheet 3,822
412 Bookbinding: process and apparatus 3,311
281 Books, strips, and leaves 5,396
462 Books, strips, and leaves for manifolding 1,124
40 Card, picture, or sign exhibiting 29,733
229 Envelopes, wrappers, and paperboard boxes 25,801
493 Manufacturing container or tube from paper; or other manufacturing from a sheet or web 22,498
D19 Office supplies; artists` and teachers` materials 20,052
162 Paper making and fiber liberation 42,592
355 Photocopying 28,411
283 Printed matter 14,808
101 Printing 37,826
D18 Printing and office machinery 9,936
D20 Sales and advertising equipment 5,603
276 Typesetting 18
400 Typewriting machines 31,497
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