US PATENT SUBCLASS 374 / 20
.~.~.~.~ Controlling heating or cooling

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


374 /   HD   THERMAL MEASURING AND TESTING

16  DF  TRANSFORMATION POINT DETERMINATION (E.G., DEW POINT, BOILING POINT) {6}
17  DF  .~ By change in optical property (e.g., transmission) {1}
18  DF  .~.~ By reflection (e.g., polished surface) {1}
19  DF  .~.~.~ Sensed by instrument (e.g., photocell) {1}
20.~.~.~.~ Controlling heating or cooling

DEFINITION

Classification: 374/20

Controlling heating or cooling:

(under subclass 19) Subject matter including a temperature modifying element for the specimen which modifying element is responsive to the light responsive element.