US PATENT SUBCLASS 83 / 522.28
.~ Bubble level

Current as of: June, 1999
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83 /   HD   CUTTING

522.11  DF  WITH SIGNAL, SCALE, OR INDICATOR {8}
522.28.~ Bubble level

DEFINITION

Classification: 83/522.28

Bubble level:

(under subclass 522.11) Device wherein the means to manifest comprises a member filled with a fluids of distinct specific gravity such that the position of the device with respect to the earth is perceptible by observation of the member.