The Art of Unuseless Inventions • Design System • Patent Drawing Aesthetic
Section 01
Color Palette
色彩設計 — Shikisai Sekkei
The Chindogu palette draws from patent office materials: manila filing folders, blueprint
reproduction ink, red rubber stamps, and the faded cream of aged technical paper.
Paper & Ink 紙とインク
1
Manila マニラ
#F5EDDA
2
Cream クリーム
#FFFBF0
3
Ink Black 墨黒
#1C1A17
4
Ink Medium 中墨
#5C5549
5
Ink Faint 薄墨
#B5AFA5
Blueprint & Stamps 設計図と印鑑
6
Blueprint Blue 設計青
#2C5F8A
7
Stamp Red 朱印
#C23B22
8
Approved Green 承認緑
#2D7D46
9
Caution Amber 警告琥珀
#B8860B
10
Classified Purple 機密紫
#6B3FA0
Section 02
Typography
文字体系 — Moji Taikei
Three font families serve distinct roles: Source Serif 4 for display headings and invention
names, IBM Plex Mono for all technical annotations and measurements, and Noto Sans JP
for bilingual Japanese labels.
Display / Source Serif 4
Umbrella Tie Holder
Family: Source Serif 4
Weight: 700
Size: 2.5rem
Use: Invention names, section titles
Technical / IBM Plex Mono
REF: CHD-2024-0042 // PATENT PENDING
Family: IBM Plex Mono
Weight: 400
Size: 1.1rem
Use: Annotations, measurements, labels
Japanese / Noto Sans JP
傘ネクタイホルダー — 雨の日の必需品
Family: Noto Sans JP
Weight: 300
Size: 1.3rem
Use: Japanese labels, bilingual captions
Body / IBM Plex Mono
The device attaches to the user's necktie via a spring-loaded clip mechanism (see Fig. 2A).
When rain is detected by the moisture sensor (component 7), the umbrella deploys automatically,
protecting the user's shirt while leaving the tie aesthetically visible through the transparent canopy.
Family: IBM Plex Mono
Weight: 300
Size: 0.85rem
Use: Descriptions, patent text
Type Scale
2.5rem
Display
1.5rem
Section Title
1.1rem
Subsection
0.85rem
Body Text
0.75rem
Annotation
0.65rem
Label / Caption
Section 03
Spacing Scale
間隔設計 — Kankaku Sekkei
A 4px base unit provides the precision expected of patent drawings.
Dimensions shown with blueprint-style hatching and measurement annotations.
--space-xs
4px
--space-sm
8px
--space-md
16px
--space-lg
24px
--space-xl
32px
--space-2xl
48px
--space-3xl
64px
BASE UNIT: 4px // SCALE FACTOR: x2
Section 04
Buttons
操作釦 — Sousa Botan
Button designs reference mechanical switch indicators and patent filing actions.
Each variant includes a numbered callout for cross-referencing in technical documentation.
A
Primary actions use solid ink fill. Secondary actions use outlined frames.
Blueprint variant for technical operations. Stamp variant for approval workflows.
主要操作は塗りつぶし、副次操作は枠線を使用
Standard Sizes
Variants
States
Section 05
Forms
申請書式 — Shinsei Shoshiki
Form elements styled as patent application fields. Each input references the
precise, measured quality of technical documentation with dotted leader-line hints.
Maximum 120 characters. Include primary function.
Include numbered references to diagram components (see Fig. 1).
Section 06
Invention Cards
発明カード — Hatsumei Card
Each card represents an invention filing. The diagram area shows where a patent
drawing would appear, with numbered callouts, dotted leader lines, and rubber stamp status marks.
CHD-001
[ FIG. 1A — FRONT ELEVATION ]
正面図
Umbrella Tie
傘ネクタイ
A necktie with an integrated retractable umbrella canopy. Deploys via
pull-cord mechanism (component 3A) when moisture sensor activates.
Fig. 1A-1C7 componentsEst. 2024
OK
CHD-002
[ FIG. 2A — CROSS SECTION ]
断面図
Butter Stick Glue
バタースティック糊
A glue-stick shaped container for butter, enabling precise toast application
without knife usage. Twist-up mechanism (see detail B).
Fig. 2A-2D4 componentsEst. 2024
REV
CHD-003
[ FIG. 3A — EXPLODED VIEW ]
分解図
Solar-Powered Flashlight
太陽光懐中電灯
A flashlight powered exclusively by an integrated solar panel. Functions
only in conditions where a flashlight is unnecessary.
Fig. 3A-3B5 componentsEst. 2024
NO
Section 07
Patent Notices
特許通知 — Tokkyo Tsuchi
Alert components styled as official patent office notices. Each type corresponds
to a filing status with appropriate stamp color coding.
!
Patent Approved — 承認済み
Your invention filing CHD-2024-0042 has been approved for inclusion in the
International Chindogu Registry. 発明が珍道具国際登録に承認されました。
X
Filing Rejected — 却下
Invention deemed too practical for Chindogu classification. Item functions as
intended without sufficient absurdity. 発明が実用的すぎるため珍道具に分類できません。
?
Under Review — 審査中
Patent application requires additional diagram annotations. Please submit
exploded view (Fig. B) and cross-section (Fig. C). 追加の図面注釈が必要です。
i
Technical Note — 技術注記
All Chindogu must adhere to the Ten Tenets: they cannot be patented, sold,
or used as propaganda. They must exist as physical objects.
珍道具は十箇条の精神に従わなければなりません。
Section 08
Technical Diagram
技術図面 — Gijutsu Zumen
A full invention diagram combines all design elements: title block, annotated sketch area,
specification table with leader lines, callout numbers, dimension lines, and approval stamps.