US PATENT SUBCLASS 73 / 443
.~.~.~ With calculator

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

32 R  DF  SPECIFIC GRAVITY OR DENSITY OF LIQUID OR SOLID {7}
441  DF  .~ Portable hand manipulable syringe type {1}
442  DF  .~.~ With thermometer {1}
443.~.~.~ With calculator

DEFINITION

Classification: 73/443

(under subclass 442) Devices including calculator mechanism or chart means for computing corrected reading, for predicting freezing temperature of the test liquid or amount of antifreeze required to protect to a certain temperature.