US PATENT SUBCLASS 237 / 2 R
AUTOMATIC CONTROL

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

Internet Version by PATENTEC © 1999      Terms of Use


237 /   HD   HEATING SYSTEMS

2 RAUTOMATIC CONTROL {9}
3  DF  .~> Brooder and incubator {1}
5  DF  .~> Car {1}
7  DF  .~> Combined radiator and boiler
8 R  DF  .~> Water {4}
9 R  DF  .~> Steam {3}
11  DF  .~> Compressed air
12  DF  .~> Processes
2 A  DF  .~> Automatic heating systems with controls
2 B  DF  .~> Heat source is a reverse cycle refrigerating system or heat pump

Unofficial Alpha Subclasses: R A B

DEFINITION

Classification: 237/2

(under the class definition) Heating systems with means for regulating temperature and pressure independent of manual control.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation, for automatic controllers when the structure of the apparatus for heating is not specifically defined.