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US4454980A Return biller envelope book 失效
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Return biller envelope book
摘要:
A number of bill paying envelopes for use in making periodic payments are removably affixed to a continuous prefolded web which carries the envelopes through a computer controlled printer wherein confidential account information is printed on the inside surface of the envelope flap, the web being subsequently folded to provide a flat booklet of said envelopes.
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