The first practical helicopter was invented about 1942
Igor Sikorsky, a Russian engineer, built his first helicopter in 1909.
So aircraft could land and take off in confined spaces and off small ships.
1733
it was inveted in 1200bc
who and when inveted the arm chair and the year
1853
Igor Sikorski invented helicopter in the year 1906.
there as 61 helicopter crashes
it aired in 1999 but Stephen hillenburg thought of it in the 1980s.
Texting was invented in the 1990's.
the moor vehicle was made by Von Diesel and was invented 1922
in April 2011 it is the right answer because i check