US PATENT SUBCLASS 257 / 699
.~.~.~ Housing entirely of metal except for feedthrough structure

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

678  DF  HOUSING OR PACKAGE {18}
690  DF  .~ With contact or lead {4}
698  DF  .~.~ With specific electrical feedthrough structure {1}
699.~.~.~ Housing entirely of metal except for feedthrough structure

DEFINITION

Classification: 257/699

Housing entirely of metal except for feedthrough structure:

Subject matter under 698 wherein the housing or package is made entirely of metal except for the portion wherein the electrical contacts or leads are fed through.

(1) Note. Typically, an insulator is placed in the feedthrough portion of a metal housing to prevent electrical short circuiting of the leads to the housing.