Adjustable and self-locking book rack or book support

Adjustable book holding device

Adjustable book shelf

Adjustable bookend apparatus

Adjustable bookrack

Adjustable divider unit to support notebooks

Adjustable support apparatus such as adjustable bookends

Apparatus for hanging binders

Arrangement for displaying study aids with textbooks

Article stowage system

Bendable bookend

Book case with shelves at random longitudinal angles

Book end

Book rack

Book rack of selective capacity

Book storage and learning center

Book support apparatus

Book support assembly

Bookend for forming from a single piece of sheet metal

Bookend for metal shelves