US PATENT SUBCLASS 219 / 121.71
.~.~.~.~.~ Methods

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

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
121.11  DF  .~ By arc {16}
121.6  DF  .~.~ Using laser {12}
121.67  DF  .~.~.~ Cutting {3}
121.7  DF  .~.~.~.~ Hole punching {1}
121.71.~.~.~.~.~ Methods

DEFINITION

Classification: 219/121.71

Methods:

(under subclass 121.70) Subject matter including the processes of perforating a workpiece.

SEE OR SEARCH CLASS

131, Tobacco,

281, for cigarette making including perforating.