US PATENT SUBCLASS 257 / 680
.~ With window means

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}
680.~ With window means {1}
681  DF  .~.~> For erasing EPROM

DEFINITION

Classification: 257/680

With window means:

Subject matter under 678 wherein the housing or package has a physical opening or area otherwise transparent to ultraviolet, visible, or infrared light.