IPC Subgroup
G09D 3/02 with interchangeable members bearing the indicia
Introduced: September 1968
Last revised: January 2006
Full Title
Perpetual calendars > with interchangeable members bearing the indicia
Classification Context
- Section:
- PHYSICS
- Class:
- EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- Subclass:
- RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS