US PATENT SUBCLASS 235 / 119
.~ Differential gears
Current as of: June, 1999
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DEFINITION
Classification: 235/119
(under subclass 115) Registers whose counting devices comprise two or more cylinders, the cylinders having connected or formed therewith gears having different numbers of teeth, but actuated by the same gear, thus causing a slow movement of one cylinder with respect to the other.
