(under subclass 39.01) Plants in combination with means whereby the device, in addition to providing useful power for external use, also serves as a source of heat or pressure fluid, such as steam, combustion products, or compressed air, for use in another art device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39.13, 39.14, 39.15+, and 39.19, for plants in which the supplemental pressure fluid, as defined above, is used in another motor.
