US PATENT SUBCLASS 313 / 160
.~ With envelope

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

153  DF  WITH MAGNETIC DEVICE {4}
160.~ With envelope {2}
161  DF  .~.~> Gas or vapor type
162  DF  .~.~> Three or more electrodes

DEFINITION

Classification: 313/160

(under subclass 153) Subject matter wherein the lamp or discharge device is provided with an envelope.

(1) Note. The magnetic field generating means may be within or without envelope.