US PATENT SUBCLASS 112 / 21
.~ Book sewing

Current as of: June, 1999
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112 /   HD   SEWING

2  DF  SPECIAL MACHINES {38}
21.~ Book sewing {1}
22  DF  .~.~> Knotting

DEFINITION

Classification: 112/21

For sewing books.

SEE OR SEARCH CLASS

227, Elongated-Member-Driving Apparatus, appropriate subclasses for apparatus for applying a member to work, e.g., signature.

412, Bookbinding: Process and Apparatus, appropriate subclasses for processes and apparatuses for manufacturing books which may involve sewing operations.