U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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Patent No. 5265827

Paddle Wheel Plane

An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.

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Class 374 - Thermal measuring and testing

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168 Subclasses


Subclasses list

Definition

This is the generic class for making a determination of either (1) a characteristic or condition of an object or system utilizing heating or cooling as a significant part of the test and not provided for in other classes, or (2) a thermal quantity or condition.

This class also includes circuitry and devices with structure unique to a thermal measurement or test and not elsewhere provided for.

(1) Note. Processes and apparatus are classified together.

Lines with other classes and within this class

A thermal measurement or test made as part of a measurement elsewhere classifiable, e.g. liquid level or flow, will be classified with the other measurement. However, a thermal measurement combined with a separate measurement, so as to provide separate determinations are classifiable herein. (See Subclass References to the Current Class, below.)

Substantially all apparatus classes include automatic control of the apparatus. Such automatic control usually involves some means to measure or test a condition or change of condition, the measuring or testing means then operating to control or regulate the apparatus in accordance with the results of the measurement or test. For such subject matter, the class appropriate to the type of apparatus controlled should be investigated.

ORGANIZATION OF THIS CLASS

For the organization of this class, see Subclass References to the Current Class, below.

 
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