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Perpetual calendars
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Industry
CPC
G09D3/00
This industry / category may be too specific. Please go to a parent level for more data
Parent Industries
G
PHYSICS
G09
Cryptography, education, displays
G09D
RAILWAY OR LIKE TIME OR FARE TABLES PERPETUAL CALENDARS
Current Industry
G09D3/00
Perpetual calendars
Sub Industries
G09D3/02
with interchangeable members bearing the indicia
G09D3/04
wherein members bearing the indicia are movably mounted in the calendar
G09D3/06
with rotatable members
G09D3/08
of disc form
G09D3/10
with members in band form
G09D3/12
electrically operated
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