US PATENT SUBCLASS 600 / 538-- .~.~ Measuring breath flow or lung capacity

US PATENT SUBCLASS 600 / 538
.~.~ Measuring breath flow or lung capacity

Current as of: June, 1999
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600 /	HD	SURGERY

300	DF	DIAGNOSTIC TESTING {38}
529	DF	.~ Respiratory {8}
538		.~.~ Measuring breath flow or lung capacity {2}
539	DF	.~.~.~> Element rotated by breath flow
540	DF	.~.~.~> Breath exhaled into or inhaled from expansible chamber {2}

DEFINITION

Classification: 600/538

Measuring breath flow or lung capacity:

(under subclass 529) Subject matter for measuring the amount of gas which (a) flows along the respiratory tract during breathing or (b) is held by the lungs.

SEE OR SEARCH CLASS

33, Geometrical Instruments, particularly

512+, for devices for measuring chest circumference and incidentally determining chest expansion.

73, Measuring and Testing,

861+, for volume or flow rate meters.

482, Exercise Devices, particularly

13, for an exercise device for improving the respiratory function of a user but which does not include a quantitative indicator of breath flow or lung capacity and which is not disclosed as a Class 128 diagnostic device.