Who invented the first envelope?

Answer

There is no record as of who invented the envelope. However, the history of envelopes record that handmade envelopes were used both domestically and commercially prior to 1845. At around 3500 to 3200 BC, envelopes were moulded as clay spheres.
Q&A Related to "Who invented the first envelope?"
A.F. Callahan of Chicago, Illinois, filed a patent for the "window envelope" on June 10, 1902. He described his invention as an envelope which would have holes for viewing
http://www.ehow.com/facts_5040293_invented-window-...
They say that the Chinese built the first rockets when they were experimenting with 'flying arrows' using gun powder. From there to the best fireworks in the world. Who knew?
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Up until 1840 all envelopes were handmade, but in that year, George Wilson of the United Kingdom patented the method of tessellating (tiling) a number of envelope patterns across
http://wiki.answers.com/Q/Who_invented_envelopes
in 1100 a cave man built the first house until now,we begin to built modern house.
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