US PATENT SUBCLASS 222 / 156
.~ Sight openings

Current as of: June, 1999
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222 /   HD   DISPENSING

154  DF  INSPECTION DEVICES {4}
156.~ Sight openings {1}
157  DF  .~.~> Graduated for level determination

DEFINITION

Classification: 222/156

(under subclass 154) Dispensers in which a portion of the container is transparent and is so placed that the level or condition of the material may be seen.