Hot air ballons were invented in 19218237 a.d.If u read this post a commentif u dont then thats mean
the penny post was invented in 1888
It was invented in 1980.
the post card was invented on 1869
the post card was invented on 1869
Air Post was created in 1990.
When was Air Conditioners invented
Air tanks were invented to hold compressed air.
it was invented in 1974 by art fry.
1986
In 1861.
The post-it note was invented by the two American scientists Arthur Fry and Spencer Silver in 1974.