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Patent Drawing Standards and Specifications
United States (USPTO)
General Requirements:
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Sheet Size: Drawings must be on A4 size paper (29.7 cm x 21 cm).
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Margins: Minimum margins are 2.5 cm (top), 2.5 cm (left), 1.5 cm (right), and 1.0 cm (bottom).
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Line Quality: Drawings must be executed in black, uniformly thick, and well-defined lines. Color drawings are not acceptable.
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Text: Drawings should not contain text except for a single word or words when necessary.
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Grouping: Figures must be grouped on a sheet without waste of space, preferably in an upright position.
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Sheet Numbering: Each sheet should be numbered using two Arabic numerals (e.g., 1/5, 2/5).
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Figure Arrangement: Figures should be arranged without wasting space, preferably upright. If not, they should be presented sideways with the top of the figures on the left side.
Flow Sheets and Diagrams:
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These must adhere to the same requirements as drawings.
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Connectors: Use on-page and off-page connectors for clarity in flow charts.
Reference Numerals:
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Sub-components: Use xxxA, xxxB, etc., where xxx corresponds to the reference numeral of the enclosing system.
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Placement: Reference numerals within a box must be underlined. Arrows or reference lines must touch the components.
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Labeling Figures: Use FIG. X with Font size 14, preferably Arial.
Design Patent Illustrations:
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Views: Multiple views are required, including top, bottom, left, right, front, back, and perspective views.
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Exploded Views: Permissible to show the relationship or order of assembly of various parts, enclosed in brackets.
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Solid Lines: Represent the claimed design features.
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Broken Lines: Indicate unclaimed features or environmental structures.
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Surface Shading: Required to show contours and character of surfaces for clarity.
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No Text: Descriptive text, dimensions, or measurements should not be included.
India (Indian Patent Act)
Page Size & Margins
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Page Size: A4.
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Margins: 4 cm on the top and left, 3 cm on the bottom and right.
Drawing Requirements
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Views: Multiple views are required to fully disclose the design, including top, bottom, left, right, front, back, and perspective views.
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Prohibited Views: Exploded views are not allowed. sideways with the top of the figures on the left side.
Lines:
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Solid Lines: Represent the claimed design features.
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Broken Lines: Indicate unclaimed features or environmental structures.
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Surface Shading: Not required; focus on clear, neat drawings.
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No Text: Descriptive matter is not allowed on the drawings, except in flow diagrams.
United Kingdom (UKIPO)
General Requirements:
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Sheet Size: Drawings must be on A4 size paper (29.7 cm x 21 cm).
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Margins: Minimum margins are 2.0 cm (top), 2.0 cm (left), 1.5 cm (right), and 1.0 cm (bottom).
Drawing Requirements:
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Views: Multiple views are required, including top, bottom, left, right, front, back, and perspective views.
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Solid Lines: Represent the claimed design features.
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Broken Lines: Indicate unclaimed features or environmental structures.
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Surface Shading: Required to show contours and character of surfaces for clarity and approval.
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No Text: Drawings should not contain text, measurements, or technical information.
Get in Touch
Phase -II, Okhla Industrial Area,
New Delhi, India
955-567-0717
Utility Patent Drawing
Detailed Representations: Show functional aspects, mechanisms, and processes.
Multiple Views: Include front, side,
top, perspective, and sectional views.
Exploded Views: Depict components
and their assembly.
Flow Diagrams: Illustrate processes
or methods
Design Patent Drawing
Ornamental Design Illustrations: Focus on the visual appearance of the product.
Surface Shading: To illustrate contours and shape.
Consistent Views: Front, rear, top, bottom, left, right, and perspective view.
Office Action Drawing
Amendment Handling: Make necessary adjustments and updates to patent drawings in response to office actions.
Examiner Instructions: Address specific critiques and requirements set by patent examiners.
