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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised
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CPC
COOPERATIVE PATENT CLASSIFICATION
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RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS (calendar blocks B42D 5/04; clockwork driven G04B; comprising computing means G06C) [2013‑01]
G09D 1/00
Railway or like time or fare tables; Indicating or reading aids therefor (essentially incorporating maps or route diagrams G09B; railway routing charts G09B; display devices, e.g. railway indicator boards G09F) [2013‑01]
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G09D 3/00
Perpetual calendars [2013‑01]
G09D 3/02
.
with interchangeable members bearing the indicia [2013‑01]
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G09D 3/04
.
wherein members bearing the indicia are movably mounted in the calendar [2013‑01]
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G09D 3/06
. .
with rotatable members [2013‑01]
G09D 3/08
. . .
of disc form [2013‑01]
G09D 3/10
. .
with members in band form [2013‑01]
G09D 3/12
.
electrically operated [2013‑01]
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Last Modified: 10/10/2013