In a postage meter having structures for entering data, for displaying numerical values and other data, and for printing postage, and having a computer electrically connected to each of the aforesaid structures and programmed for processing data for controlling their operation, wherein the data entering...http://www.google.de/patents/US4577283?utm_source=gb-gplus-sharePatent US4577283 - Postage meter with keyboard keys for causing meter operations to be performed
