US PATENT SUBCLASS 219 / 91.21
.~.~.~.~ Of welding through insulation

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
78.01  DF  .~ For bonding with pressure (e.g., resistance welding) {16}
86.1  DF  .~.~ By spot bonding {12}
91.2  DF  .~.~.~ Methods {4}
91.21.~.~.~.~ Of welding through insulation

DEFINITION

Classification: 219/91.21

Of welding through insulation:

(under subclass 91.2) Subject matter including the processes of bonding through material through which essentially no current will flow.

SEE OR SEARCH THIS CLASS, SUBCLASS:

92+, for methods of welding current limitation including

interposed insulation.