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CLASS D25,	BUILDING UNITS AND CONSTRUCTION ELEMENTS
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SECTION I - CLASS DEFINITION

This class provides for design patents claiming ornamental designs for:

1. Structure

2. Prefabricated Unit

3. Stair, Ladder, Scaffold or Similar Support

4. Trellis of Treillage Unit

5. Architectural Stock Material

6. Miscellaneous

SECTION II - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

SUBCLASSES

1	STRUCTURE:
	This subclass is indented under the class definition.  Design for building, supporting framework, or infrastructure. Example of a design for a structure. (1) Note. Includes bridge. SEE OR SEARCH THIS CLASS, SUBCLASS: 56 through 57 , for roof with no structure other than support. SEE OR SEARCH CLASS: D6,  Furnishings,   subclass 421 and 553-574 for structure that encloses telephone only. D12,  Transportation,   subclasses 101 through 106for mobile home or trailer; subclass 203 for step place for vehicle; subclass 325 for space habitat. D21,  Games, Toys, and Sports Goods,   subclasses 506 through 511for toy building, subclasses 834-838 for tent. D99,  Miscellaneous,   subclasses 1 through 7for burial vault.

35	PREFABRICATED UNIT:
	This subclass is indented under the class definition.  Design for factory built-type building or enclosure. Example of a design for a prefabricated unit. (1) Note. Includes only plural components that are preassembled as a unit, such as a steeple, cupola, etc. SEE OR SEARCH THIS CLASS, SUBCLASS: 62 through 69 , for stair, ladder, or scaffold. 100 through 101 , for trellis. 126 through 135 , for post, support, or beam. 102 through 198 , for individual building components. SEE OR SEARCH CLASS: D6,  Furnishings,   subclass 421 and 553-574 for structure that encloses telephone only. D12,  Transportation,   subclasses 101 through 106for mobile home or trailer; subclass 203 for step place for vehicle; subclass 325 for space habitat. D21,  Games, Toys, and Sports Goods,   subclasses 815 and 816 for portable swimming or wadding pool. D23,  Environmental Heating and Cooling; Fluid Handling and Sanitary Equipment,   subclass 308 for tiles assembled into countertop; subclass 404 for fireplace mantel. D26,  Lighting,   subclass 68 for lamp combined with post; subclasses 120-124 for lens or glass for lighting fixture. D34,  Material of Article Handling Equipment,   subclass 28 for escalator; subclass 30 for mobile stair for boarding aircraft; subclass 33 for elevator.

62	STAIR, LADDER, SCAFFOLD, OR SIMILAR SUPPORT:
	This subclass is indented under the class definition.  Design for flight of fixed steps or non-permanent structure to elevate or channel human body. Example of design for a stair. (1) Note. Includes ramp. (2) Note. Includes bleachers. SEE OR SEARCH CLASS: D34,  Material of Article Handling Equipment,   subclass 28 for escalator; subclass 30 for mobile stair for boarding aircraft; subclass 31 for vehicle jack or jack stand; subclass 33 for elevator.

100	TRELLIS OR TREILLAGE UNIT:
	This subclass is indented under the class definition.  Design for light framework or structure for supporting climbing plants. Example of a design for a trellis. SEE OR SEARCH CLASS: D11,  Jewelry, Symbolic Insignia and Ornaments,   subclasses 143 through 163for form or holder for flower or flower arrangement.

102	ARCHITECTURAL STOCK MATERIAL:
	This subclass is indented under the class definition.  Design for fabrication parts for building constriction. Example of a design for architectural stock material. SEE OR SEARCH CLASS: D5,  Textile or Paper Yard Goods, Sheet Material,   appropriate subclasses for cloth, textile or wallpaper. D6,  Furnishings,   subclasses 582 through 594for linoleum-type floor rug or tiles assembled into floor or wall covering. D8,  Tools and Hardware,   appropriate subclasses for fence or railing hardware; subclass 1 for plant stake; subclasses 323-329 for gate hinge; subclasses 331-335 for gate latch; subclass 377 for track for sliding door; subclass 384 for concrete wall tie. D14,  Recording, Communication, or Information Retrieval Equipment,   subclass 219 for grille for audio or video equipment. D21,  Games, Toys, and Sports Goods,   subclasses 484 through 504for toy construction building blocks; subclass 802 for diving board. D23,  Environmental Heating and Cooling; Fluid Handling and Sanitary Equipment,   subclass 266 for pipe, tubing, or hose; subclass 267 for roof-type gutter; subclass 308 for tiles assembled into countertop; subclass 404 for fireplace mantel. D26,  Lighting,   subclass 68 for lamp combined with post; subclasses 120-124 for lens or glass for lighting fixture.

199	MISCELLANEOUS:
	This subclass is indented under the class definition.  Design directed to a building unit or construction element not elsewhere provided for.

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