IPC Subclass
G09D RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS
Introduced: September 1968
Classification Context
- Section:
- PHYSICS
- Class:
- EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- Subclass:
- RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS
Description
Covers mechanical or analog display devices used for presenting railway timetables, transportation schedules, fare information, and perpetual calendar systems. Includes fixed or adjustable display mechanisms such as flip cards, rotating drums, sliding panels, and similar devices designed for public information purposes in transportation venues. Excludes digital electronic displays and automated ticketing systems, which fall under different classifications.
Scope Notes
Limiting references: Calendar blocks in printed format
2 direct subcodes
Child Classifications
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