I think it was Germany during World War 2...but yet again those may be the first combat ready helicopters...Anyways the German ones were by far betetr than all others at the time.
the united states
The first helicopter was made in 1909.
The Soviet Union made the largest helicopter, the Mil Mi-12. The first prototype made its first lift-off on June 27, 1967.
The first Helicopter was made by Igor Sikorsky, in 1939.
No, the first practical helicopter was made in 1941.
The first helicopter produced in Vietnam was the V-24, which was developed in the early 1980s by the Vietnam Helicopter Corporation. The prototype was completed in 1984, marking a significant milestone in Vietnam's aviation industry, as it was the country's first domestically manufactured helicopter.
Igor Sikorsky made the first practical helicopter
Igor Sikorsky made the first practical helicopter
Igor Sikorsky, a Russian born American, made the world's first practical helicopter.
Sikorsky made the first practical helicopter. Bell followed very soon after
The first practical helicopter built was the Sikorsky VS300, as in pic.
Berlin