US PATENT SUBCLASS 235 / 64
.~ Adding pencils
Current as of: June, 1999
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DEFINITION
Classification: 235/64
(under subclass 61) Subject matter comprising devices attached to a pencil or similar instrument which are employed to keep account of the sum of columns to be added or the number of tens to be "carried", usually operated by the pressure of the point upon the paper or desk.
(1) Note. Adding devices that are merely adapted to be clamped to a pencil, but do not form part thereof and are not operated by the movement of the pencil, are not classified herein, but are classified according to the structure of the adding device itself.
