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Class Information
Number: 281
Name: Books, strips, and leaves >
Description: Books, strips, and leaves and various combinations thereof, combinations thereof with other things for which no other place is provided, processes of making where the processes are fully disclosed in the articles, and accessories to books, strips, and leaves, such as protectors, book-leaf holders and marks, and holders, therefor, for which no other place is provided.

Class Number	Class Name	No. of Patents
281/3.1	Book and leaf	50
281/4.1	Blotter leaf	1
281/4	Removable cover	11
281/45	Book or leaf holder	397
281/46	Cooperating with leaf fold	53
281/47	Continuous with fold	32
281/49	Hinged	22
281/48	Pliant, deformable means	34
281/50	Extending through aperture at juncture	8
281/15.1	Book, element thereof, or accessory therefor	519
281/21.1	Binding	391
281/23	Continuous strip	21
281/28	Elements	86
281/24	Guard	2
281/27.3	Metallic	20
281/27.1	Ring or arch	35
281/27.2	Metallic	19
281/22	Scrapbook	70
281/27	Sewed	9
281/26	Undercut slot	2
281/43	Book hanger	52
281/29	Covers	455
281/36	Backs	144
281/33	Easel type	73
281/35	Flexible	68
281/34	Removable	81
281/37	Sides	149
281/30	With pencils	57
281/31	With pockets	355
281/32	With pulls	11
281/38	Leaves	345
281/42	Book-leaf holders and marks	226
281/39	Erasable surface	16
281/40	Flat opening	24
281/41	Single leaf	10
281/16	Multiple	39
281/17	Removable cover	22
281/44	Pad holder	78
281/20	Protectors	47
281/19.1	Removable cover	56
281/19.2	Loop engaging	5
281/18	Sealed	29
281/DIG.1	Magnet	17
281/51	Miscellaneous	250
281/2	Strips and leaves	288
281/5	Strips	276
281/14	Strip retained	6
281/6	With platen	6
281/10	Leaf retained	1
281/7	Strip retained	12
281/9	With attaching means	8
281/8	With feed	6
281/12	With attaching means	14
281/13	Wall	4
281/11	With feed	3