US PATENT SUBCLASS 219 / 91.22
.~.~.~.~ With additional heating to same spot

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}
91.22.~.~.~.~ With additional heating to same spot

DEFINITION

Classification: 219/91.22

With additional heating to same spot:

(under subclass 91.2) Subject matter including means to apply heat more than once to same area of the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78.13, for additional heating devices.