US PATENT SUBCLASS 219 / 78.02
.~.~ By solid-state bonding (e.g., diffusion)

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}
78.02.~.~ By solid-state bonding (e.g., diffusion)

DEFINITION

Classification: 219/78.02

By solid-state bonding (e.g., diffusion):

(under subclass 78.01) Subject matter wherein the workpiece joint interface coalescence is produced essentially at temperatures below the melting point of the metals being joined, without the addition of a brazing filler metal.