Class Definition for Class 128

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CLASS 128,	SURGERY
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SECTION I - CLASS DEFINITION

This class includes methods of treatment of the living body and apparatus used in the inspection and treatment of diseases, wounds, and other abnormal conditions of the bodies of humans and lower animals.

This class includes methods and means for manufacturing surgical appliances which are not classifiable in other classes.

(1) Note. This class appropriate subclasses, provides for a method of blood transfusion or artificial inseminations.

(2) Note. This class includes methods and apparatus wherein specific structure, adapted to be placed on or in the living body, is claimed, and further includes diagnostic or therapeutic methods and apparatus wherein no such specific structure is claimed, when the only disclosed utility is for diagnosis or treatment of a living body. In addition, subcombinations of surgical treatment or testing apparatus are classified in the class when not specifically provided for elsewhere.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

Class 604, Surgery, is an integral part of Class 128, Surgery, and all notes and class lines of Class 128 apply to Class 604. Class 604 follows the hierarchy of Class 128, Class 604 merely replaces the Medicators and Receptors portion of Class 128. For the purpose of convenience, Class 604 is referred to as a separate Class.

LINE WITH CLASS 4

Generic terms such as "treatment", "therapy", "massage", "hydrotherapy", "hydromassage", etc., are to be interpreted broadly for placement in Class 4 lacking a disclosed body treatment for a named medical condition or physical injury. Exceptions to this rule comprise generically disclosed and claimed hydrotherapy of the genitalia or any internal body tissues, or a device for applying a force which imparts a specific motion to the body or portion thereof, or a device which is disclosed as providing treatment resulting in an internal action on the body which shall be classified in Class 128 or one of its Class 600 series trailer classes as provided for therein.

LINE WITH CLASS 239

Generic terms such as "treatment"", "therapy", "massage", "hydrotherapy", "hydromassage", etc. are to be interpreted broadly for placement in Class 239 lacking a disclosed body treatment for a named medical condition or physical injury. Exceptions to this rule comprise generically disclosed and claimed hydrotherapy of the genitalia or any internal body tissues, or a device for applying a force which imparts a specific motion to the body or portion thereof which shall be classified in Class 128 or one of its Class 600 series trailer classes as provided for therein.

SECTION III - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

4,	Baths, Closets, Sinks, and Spittoons, for a bathing device generically disclosed and claimed which does not provide medical treatment to the body for a named ailment or injury thereof. (See Lines With Other Classes and Within This Class, for the lines between Class 4 and Class 128 or one of its series trailer classes as provided for therein.)
5,	Beds, subclasses 630+ for a table designed to serve as a support for an animal during surgical operations, especially for a device attached to or combined with a table comprising a mere body support for surgical operations.
27,	Undertaking, for means for embalming or otherwise caring for the dead body.
36,	Boots, Shoes, and Leggings, appropriate subclasses for foot coverings and foot devices for general use.
73,	Measuring and Testing, subclasses 863+ for samplers; and particularly subclasses 864.01+ for a pipette (e.g., syringe, hollow needle, etc.) which does not contact the living body.
81,	Tools, subclass 9.22 for a tattooing device including means to reciprocate (e.g., vibrate) a perforating tool and to discharge coloring material into the perforations.
108,	Horizontally Supported Planar Surfaces, subclasses 1+ for a horizontally supported surface which is tiltable.
119,	Animal Husbandry, for means for the treatment and general care of livestock, subclass 14.21 for milking catheters disclosed for that purpose and subclasses 712+ for body harness of general application. See the search notes thereunder.
132,	Toilet, appropriate subclasses for methods and devices used by persons in making their toilet, particularly subclasses 212+ for devices for treating, dressing, or manipulating the hair, and subclasses 73+ for devices for manicuring the nails and for removing corns and other callosities by abrasion.
168,	Farriery, appropriate subclassesfor means for the care of the feet of animals.
239,	Fluid Sprinkling, Spraying, and Diffusing, appropriate subclassesfor a spray head, including the massaging type generically disclosed and claimed which does not provide medical treatment for a named ailment or injury. (See Lines With Other Classes and Within This Class, for the lines between Class 239 and Class 128 or one of its series trailer classes as provided for therein.)
257,	Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), subclasses 414+ for such devices used as sensors (e.g., chemical sensors, pressure sensors, etc.), that are small enough to be inserted in a body to be used for measuring and testing.
297,	Chairs and Seats, appropriate subclasses for a chair whose component parts may be manipulated to place an occupant in a desired position to facilitate examination or treatment, but which have no examination or treatment means combined therewith.
312,	Supports: Cabinet Structure, subclass 209 for cabinets specially designed for laboratory, dental, barber or medical use.
351,	Optics: Eye Examining, Vision Testing and Correcting, subclasses 1+ for optical eye examining and vision testing instruments; and subclasses 41+ for spectacles and eyeglasses. See also References to Other Classes in the Class 351 Class Definitions and (1) Note under subclasses 200+ of this class for statements as to subject matter classified in this class and Class 128.
401,	Coating Implements With Material Supply, subclass 28 for a multiple (massaging) tip, multiple discharge implement adapted to be applied to the human body.
424,	Drug, Bio-Affecting and Body Treating Compositions, appropriate subclass for a medicinal composition or process of use of a compound or composition and particularly subclass 467 for a composition of that class comprising a structural feature and see the definition of that class for the line between Class 128 and Class 424.
428,	Stock Material or Miscellaneous Articles, appropriate subclasses, for a stock material product in the form of a single or plural layer web or sheet, and subclasses 364+ for a structurally defined (e.g., crimped, particular cross-section) or coated rod, strand, fiber or filament.
433,	Dentistry, appropriate subclasses for subject matter restricted to (sole disclosure) specific dental steps or means. Apparatus wherein a specific nondental surgical use is disclosed and are classified as originals in Class 128.
435,	Chemistry: Molecular Biology and Microbiology, subclasses 1 and 2 for a method of maintaining the viability of an animal tissue or cell, e.g., bone, blood or sperm.
436,	Chemistry: Analytical and Immunological Testing, for processes of chemical testing, processes of an vitro antigen-antibody testing and compositions therefore.
520,	Synthetic Resins or Natural Rubbers, especially Class 523, subclasses 105+ for nonmedicated compositions containing a synthetic resin or natural rubber having utility specifically intended to be for contact with living animal tissue; and subclass 111 for a composition which is to be used in a protective bandage for an open wound or as a tape adhesive, binder, or impregnate for a body absorbent device; or to processes of preparing said compositions.
623,	Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor, appropriate subclassesfor prosthetic devices.

SUBCLASSES

[List of Patents for class 128 subclass 95.1]

95.1

TRUSS:

This subclass is indented under the class definition. Surgery in which an appliance presses on or treats a portion(s) of the body for supporting and protecting.

(1) Note. This subclass also includes covers for truss belts, frames and pads.

SEE OR SEARCH CLASS:

450,	Foundation Garments, subclasses 7+ for breast bandages or brassieres combined with abdominal supporter or bandages wherein the latter has no claimed pressure pads or claimed means for holding or retaining such a pad and subclasses 94+ for abdominal supporters or bandages having no claimed pressure pad or claimed means for holding or retaining such a pad.
602,	Surgery: Splint, Brace, or Bandage, subclasses 32+ for skeletal traction applicator.

96.1	Abdominal:
	This subclass is indented under subclass 95.1. Subject matter having a truss pad which covers or supports a large section of that portion of the body lying between the thorax and the pelvis.

97.1	Head:
	This subclass is indented under subclass 95.1. Subject matter for exerting pressure on the uppermost or foremost portion of the body.

98.1	Perineal:
	This subclass is indented under subclass 95.1. Subject matter for exerting pressure on that portion of the body having a pelvic region containing urogenital and rectal passages which are bounded in part by a pubic arch, in the back by a cocyx, and laterally by a portion of a hip bone.

[List of Patents for class 128 subclass 99.1]

99.1

Support:

This subclass is indented under subclass 95.1. Subject matter in which belt or frame means functions to both maintain a truss pad against a particular portion of the body and aids in applying pressure to said truss pad.

(1) Note. Back support members for trusses are cross-referenced in this subclass because of their support nature.

100.1	Belt wholly flexible:
	This subclass is indented under subclass 99.1. Subject matter wherein the pad maintaining and pressuring means is a long, narrow strip of pliable material capable of being bent to the shape of the body.

101.1	Elastic in part:
	This subclass is indented under subclass 100.1. Subject matter wherein a portion of the pliable material is resilient and capable of returning to its original shape or form after deformation.

102.1	Belt and frame:
	This subclass is indented under subclass 99.1. Subject matter wherein a long, narrow strip of pliable material capable of being bent to the shape of the body has structure mad of metal or equivalent stiff material which holds the pad.

103.1	Frame hinged:
	This subclass is indented under subclass 99.1. Subject matter in which the pad holder structure is of several parts which parts (which parts) are joined in such a way as to permit relative rotation or pivoting with respect to one another.

104.1

Frame wholly metallic:

This subclass is indented under subclass 99.1. Subject matter wherein the pad support is metallic.

(1) Note. Parents disclosing metallic pad supports covered with, lacquer, shellac, rubber, plastic, etc. would be classifiable here.

105.1	Frame with auxiliary straps:
	This subclass is indented under subclass 99.1. Subject matter wherein the support means is provided with flexible straps which aid in positioning the support upon the body.

106.1	Pad carrier:
	This subclass is indented under subclass 99.1. Subject matter wherein significance is attributed to the belt or frame support means is separable from the belt or frame support.

107.1	Detachable:
	This subclass is indented under subclass 106.1. Subject matter wherein the pad support means is separable from the belt or frame support.

108.1	Pivoted:
	This subclass is indented under subclass 106.1. Subject matter wherein the pad support means is capable of rotating or swinging motion about a fixed point on the frame or belt on which it is supported.

109.1	Resilient:
	This subclass is indented under subclass 108.1. Subject matter wherein the pivotable pad support is flexibly or yieldably mounted on the belt or frame support means.

110.1	Clamped:
	This subclass is indented under subclass 108.1. Subject matter wherein the pivoted member is secured to the belt or frame support means by a gripping means.

111.1	Resilient:
	This subclass is indented under subclass 106.1. Subject matter wherein the pad support means is flexibly or yieldably mounted on the belt or frame support means.

112.1	Pad:
	This subclass is indented under subclass 95.1. Subject matter wherein significance is attributed to the pressing or pressure applying element.

113.1	Composition:
	This subclass is indented under subclass 112.1. Subject matter wherein significance is attributed to the component materials or make up of the pressing or pressure applying element.

114.1	Medicating:
	This subclass is indented under subclass 112.1. Subject matter wherein the pressing or pressure applying element is provided or pressure applying element is provided with a portion or portions which contain or carry a medicament.

115.1	Rigid:
	This subclass is indented under subclass 112.1. Subject matter wherein the pressing or pressure applying element is inflexible.

116.1	Adjustable center:
	This subclass is indented under subclass 112.1. Subject matter wherein the pressing or pressure element has a middle or core portion which is capable of being reoriented in respect to the body of the pressing or pressure element.

117.1	Resilient:
	This subclass is indented under subclass 112.1. Subject matter wherein the pressing or pressure element is, at least in part, flexible or yieldable.

118.1	Inflated:
	This subclass is indented under subclass 117.1. Subject matter wherein the flexible or yieldable portion of the pressing or pressure element is capable of being expanded or distended by air pressure.

119.1	Spring:
	This subclass is indented under subclass 117.1. Subject matter wherein the flexible or yieldable pressing or pressure element is means which is capable or regaining its original shape after being compressed or extended beyond its elastic limit.

120.1	Stuffed:
	This subclass is indented under subclass 117.1. Subject matter wherein the flexible or yieldable portions of the pressing or pressure element is packed with a material.

121.1	Connections:
	This subclass is indented under subclass 112.1. Subject matter wherein significant is attributed to an element which secures the pressing or pressure element or pressure pad upon a pad carrier or other pad support means.

122.1	Ball and socket:
	This subclass is indented under subclass 121.1. Subject matter wherein the securing means is a spherical element which is designed to fit into an opening or cavity which permits rotation of said element relative to said opening or cavity.

123.1	Hinged:
	This subclass is indented under subclass 121.1. Subject matter wherein the securing element is a jointed or flexible means which permits turning or pivoting relative to a stationary member.

124.1	Clamped:
	This subclass is indented under subclass 121.1. Subject matter wherein the securing element is a gripping means.

125.1	Resilient:
	This subclass is indented under subclass 121.1. Subject matter wherein the securing element is a flexible or yieldable means.

126.1	Spring only:
	This subclass is indented under subclass 125.1. Subject matter wherein the flexible or yieldable means is capable or resuming its original shape or position upon being compressed or extended beyond its elastic limit.

200.11

MEANS FOR PASSING RESPIRATORY GAS THROUGH BODY OF LIQUID BEFORE INHALATION:

This subclass is indented under the class definition. Subject matter for releasing into a body of liquid a breathable gas that is thereafter inhaled by a living thing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200.14+,	for atomizers or sprayers.
200.24,	for respiration devices, per se.
200.29,	for means for releasing exhaled gas in finely divided form from a diving mask or helmet to reduce the possibility of bubbles of the gas being detected.
203.12,	for other means for mixing an agent with breathed gas.

200.12	Pocket type:
	This subclass is indented under subclass 200.11. Subject matter comprising a self-contained means intended to be carried in a pocket of a garment.

200.13	Plural orifice means passing gas into liquid:
	This subclass is indented under subclass 200.11. Subject matter including plural orifice means passing the gas into the body of liquid.

200.14

LIQUID MEDICAMENT ATOMIZER OR SPRAYER:

This subclass is indented under the class definition. Subject matter which reduces a liquid medicament (e.g., water, disinfectant, decomgestant, etc.) to minute particles, or which produces a diffused spray of such liquid (e.g., shower head-type diffusers, etc.).

(1) Note. Atomizers or sprayers, per se, are classified in other classes (e.g., Class 239, Fluid Sprinkling, Spraying, and Diffusing) when no means particularly adapting them for use on or in a living body is claimed, or when no structure adapted to be connected to a respiratory device for a living thing is claimed and something other than a medicament is atomized or sprayed.

(2) Note. Atomizers for dispensing adhesive to body tissue, either internally or externally, are classified in Class 604 when the atomized adhesive is not inhaled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200.11,

for devices passing gas through a body of liquid before inhalation.

SEE OR SEARCH CLASS:

123,	Internal-Combustion Engines, subclasses 131+ for combustion charges atomized devices.
239,	Fluid Sprinkling, Spraying, and Diffusing, appropriate subclassesfor other than medicating atomizers and sprayers.
261,	Gas and Liquid Contact Apparatus, subclasses 78+ for atomizer type contact devices.
604,	Surgery, subclass 94.01 for dual nozzles inserted into nasal passages; subclasses 212+ for collapsible material reservoir structure such as squeeze bulbs; and subclasses 264+ for noz inserted in the body.

200.15	With tongue depressor:
	This subclass is indented under subclass 200.14. Subject matter including means for depressing the user’s tongue so that it will not occlude the gas passage to the lungs.

200.16	Ultrasonic:
	This subclass is indented under subclass 200.14. Subject matter including a means for atomizing or spraying a liquid by producing a vibratory frequency therein higher than that detectable by the human ear.

200.17	Rotating:
	This subclass is indented under subclass 200.14. Subject matter including a rotating means (e.g., a spinning disk from which liquid is discharged by centrifugal force, etc.) for atomizing or spraying.

200.18

Spray impinged against baffle in or adjacent flow conduit:

This subclass is indented under subclass 200.14. Subject matter including a baffle in a flow conduit or adjacent the outlet of a flow conduit, upon which baffle the atomized or sprayed fluid impinges.

(1) Note. The baffle in this subclass must be an additional element in or adjacent the flow conduit, not merely a wall portion of the conduit.

200.19	Means for selectively dispensing different fluids:
	This subclass is indented under subclass 200.14. Subject matter including means for selectively dispensing different fluids, e.g., air or water.

200.21	Gas stream aspirating medicament from reservoir:
	This subclass is indented under subclass 200.14. Subject matter including means for sucking a medicament from a reservoir.

200.22	Gas flow induced by expansion chamber device (e.g., piston/cylinder ram, squeeze bulb, etc.):
	This subclass is indented under subclass 200.21. Subject matter including an expansion chamber means for inducing gas flow.

200.23

Pre-pressurized container holding medicament:

This subclass is indented under subclass 200.14. Subject matter including a pre-pressurized container holding the medicament.

(1) Note. Devices found in this subclass are usually of the "aerosol" type wherein the container holding the medicament is pressurized, during manufacture, with a gas which acts to expel the medicament during use.

200.24

RESPIRATORY METHOD OR DEVICE:

This subclass is indented under the class definition. Subject matter relating to the supply of a breathable gas to, or exhaust of such gas from, a living body.

(1) Note. Respirators claiming a breath flow meter are classified here where the breath flow indication is merely for monitoring the proper operation of the respirator. Breath flow measurement devices for diagnostic purposes are found in Class 600, subclasses 538+.

(2) Note. Respiratory gas includes gas taken into the body through the skin.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200.11+,	for respiration devices claiming means for passing a breathable gas through a body of liquid.
200.14+,	for respiration devices claiming atomizer or sprayer means.

SEE OR SEARCH CLASS:

95,	Gas Separation: Processes, for processes of gas separation, per se.
96,	Gas Separation: Apparatus, for apparatus for gas separation, per se.
137,	Fluid Handling, appropriate subclasses for valves and flow regulating means not combined with body accommodating means.
251,	Valves and Valve Actuation, for a valve, per se.
452,	Butchering, subclass 66 for gas chambers used in killing animals for food.

200.25

Artificial gill, or means for separating entrained air from liquid stream:

This subclass is indented under subclass 200.24. Subject matter including an artificial gill or a means for separating entrained air from a liquid stream.

SEE OR SEARCH CLASS:

96,	Gas Separation: Apparatus, subclasses 155+ for degasifying means for a liquid, per se.

200.26

Means placed in body opening to facilitate insertion of breathing tube:

This subclass is indented under subclass 200.24. Subject matter including means placed in a natural or previously formed opening in the body to facilitate the insertion of a breathing tube therein.

(1) Note. Classifiable here are respiration devices including an outer tube which may be inserted prior to insertion of a coaxial inner tube, e.g., devices including coaxial tubes where the inner tube may be removed (as for cleaning, etc.), since the outer tube is inherently a means to facilitate insertion of a breathing tube even if not so disclosed. Also classifiable here are devices insertable into a breathing tube to facilitate insertion of the latter within the body.

SEE OR SEARCH THIS CLASS, SUBCLASS:

207.14+,

for respiratory gas supply means entering the mouth or a tracheotomy incision.

SEE OR SEARCH CLASS:

604,	Surgery, subclasses 264+ for nozzles, trocars, and catheters inserted into the body for therapeutic purposes.

200.27

Gas stream directed away from face mask to penetrate contaminated atmosphere:

This subclass is indented under subclass 200.24. Subject matter wherein a gas stream is directed away from a face mask to penetrate a contaminated atmosphere, usually for the purpose of enabling the user of the face mask to see clearly.

(1) Note. See subclass 205.25 for the definition of a face mask.

SEE OR SEARCH CLASS:

454,	Ventilation, subclasses 88+ for protective air currents used in a ventilating system.

200.28

Body or head supported means, other than face mask or hood, with gas stream to screen face or penetrate contaminated atmosphere:

This subclass is indented under subclass 200.24. Subject matter including means, other than a face mask or hood, with a gas stream to screen the user’s face or penetrate a contaminated atmosphere.

(1) Note. A "hood" as used herein is a cover for the scalp and face. See subclass 205.25 for the definition of a face mask.

SEE OR SEARCH CLASS:

454,	Ventilation, subclasses 88+ for protective air currents used in a ventilating system.

200.29

Underwater exhalation dispersing means:

This subclass is indented under subclass 200.24. Subject matter for dispersing exhaled gas from a diver’s mask, helmet, or other underwater apparatus into ambient water in finely divided form.

(1) Note. Devices in this subclass are usually for preventing detection of the diver or for decreasing the noise caused by exhalation into water to improve communication between divers.

201.11

Draw-type snorkel:

This subclass is indented under subclass 200.24. Subject matter for use under water including means extending to the surface of the water to allow the user to draw air from the atmosphere with no means to supply respiratory gas under positive pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

201.27,	for diving or swimming devices including a head cover.
204.18+,	for diving or swimming devices supplying respiratory gas under positive pressure.

201.12

Corrective or magnifying lens combined with face mask having eyepiece or transparent viewing portion:

This subclass is indented under subclass 200.24. Subject matter including a face mask with an eyepiece or transparent viewing portion and an additional corrective or magnifying lens.

(1) Note. See subclass 205.25 for the definition of a face mask.

201.13

Inhaled gas heated or humidified by exhaled gas:

This subclass is indented under subclass 200.24. Subject matter wherein the inhaled gas is heated or humidified by exhaled gas.

(1) Note. This subclass includes, inter alia, devices including merely a filter means functioning as a heat exchanger or humidifier by trapping warm water vapor present in the exhaled gas and subsequently transferring the heat and water vapor to gas inhaled through the filter. Similar filter means are placed elsewhere under subclass 200.24 where no heat exchange or humidifying feature is disclosed (see especially subclasses 205.27+).

201.14

Viewing strip slidable relative to mask:

This subclass is indented under subclass 200.24. Subject matter including a viewing strip slidable relative to a face mask so that a portion of the strip that has become damaged or soiled during use of the mask can be replaced by a clear portion of the strip.

(1) Note. See subclass 205.25 for the definition of a face mask.

201.15

Means for keeping viewing member (e.g., eyeglass, transparent face shield, etc.) clear:

This subclass is indented under subclass 200.24. Subject matter including means for keeping a viewing member clear.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206.22,

for means for handling liquid (e.g., saliva, breath condensation, etc.) accumulated in a mask.

201.16	Wiper:
	This subclass is indented under subclass 201.15. Subject matter including a wiper for keeping the viewing member clear.

201.17

Mask with porous lower filtering portion and impervious upper portion shielding user"s eyeglasses from exhaled breath:

This subclass is indented under subclass 201.15. Subject matter including a mask with a porous lower filtering portion and an impervious upper portion shielding the user’s eyeglasses from the exhaled breath.

(1) Note. Devices in this subclass are usually a "surgical-type" mask formed entirely of cloth, etc., with an impervious upper portion.

201.18	Means for preventing nasal inhalation:
	This subclass is indented under subclass 200.24. Subject matter including means for preventing nasal inhalation.

201.19

Means for transmitting, or facilitating, voice communication from face mask, hood, or helmet:

This subclass is indented under subclass 200.24. Subject matter including means for transmitting, or facilitating, voice communication from a face mask, hood, or helmet.

(1) Note. A patent is placed here when merely a means adapted to hold a voice transmitting means is claimed. See subclass 205.25 for the definition of a face mask, and (1) Note under subclass 200.28 for the definition of a hood.

SEE OR SEARCH THIS CLASS, SUBCLASS:

200.29,

for a device for dispersing exhaled gas from a diver’s mask or helmet into ambient water in finely divided form.

201.21

Using liquified oxygen:

This subclass is indented under subclass 200.24. Subject matter using liquified oxygen, usually as a source of gas for breathing.

SEE OR SEARCH CLASS:

62,	Refrigeration, appropriate subclassesfor devices for manufacturing and handling liquified gas.

201.22

Including body or head supported means covering user’s scalp:

This subclass is indented under subclass 200.24. Subject matter including a means which covers the user’s scalp and which is supported by the head or other portion of the user’s body.

(1) Note. Straps extending over or around the head to attach a face mask are not considered a scalp cover for this subclass.

201.23

And nose and mouth also covered:

This subclass is indented under subclass 201.22. Subject matter wherein a portion of the scalp covering means, or a face mask associated therewith, overlies the nose and mouth.

(1) Note. See subclass 205.25 for the definition of a face mask.

201.24

Face mask, visor, or like face-covering means hinged to scalp covering means:

This subclass is indented under subclass 201.23. Subject matter wherein a face mask, visor, or like face-covering means is hinged to a means covering the user’s scalp.

(1) Note. See subclass 205.25 for the definition of a face mask.

201.25

Means for removing substance from respiratory gas:

This subclass is indented under subclass 201.23. Subject matter including means for removing a substance from the respiratory gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

204.16,

205.12, and 205.27+, for other means for removing a substance from respiratory gas.

SEE OR SEARCH CLASS:

96,	Gas Separation: Apparatus, for apparatus for gas separation, per se.