US PATENT SUBCLASS 400 / 28
.~.~ Including adjustment of book support relative to typewriter (e.g., for top or bottom of book, etc.)

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

23  DF  FOR TYPING ON FLAT RECORD-MEDIUM OR AGAINST FLAT PLATEN {14}
24  DF  .~ For typing on a book {4}
28.~.~ Including adjustment of book support relative to typewriter (e.g., for top or bottom of book, etc.)

DEFINITION

Classification: 400/28

Including adjustment of book support relative to typewriter (e.g., for top or bottom of book, etc.):

(under subclass 24) Subject matter wherein significance is attributed to modifications made in the position of that portion of a typewriter that holds a book in position to be typed on.

(1) Note. This subclass also provides for a support that holds a book upright so that the top or the bottom of a book may be typed on.