US PATENT SUBCLASS 33 / 21.1
.~ Curved surface

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


33 /   HD   GEOMETRICAL INSTRUMENTS

18.1  DF  SCRIBER {10}
21.1.~ Curved surface {4}
21.2  DF  .~.~> Spherical
21.3  DF  .~.~> Pipe junction
21.4  DF  .~.~> Tumbler engraving
22  DF  .~.~> Pantographic

DEFINITION

Classification: 33/21.1

Curved surface:

(under subclass 18.1) Subject matter wherein the means for describing a line marks a surface that is not planar.