US PATENT SUBCLASS 73 / 752
.~ McLeod type


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

700  DF  FLUID PRESSURE GAUGE {20}
752.~ McLeod type


DEFINITION

Classification: 73/752

McLeod type:

(under subclass 700) Subject matter comprising means for measuring the degree of vacuum wherein a definite volume of the medium subjected to vacuum conditions is compressed by a predetermined head and the amount of such compression is a measure of the degree of vacuum.