Wright brothers
The Supermarine Spitfire was a British single-seat fighter aircraft. It carried no passengers.
The British ship HMS Hermes was the first ship designed and built as an aircraft carrier. She was commissioned in 1924. The Japanese ship Hosho was the first converted aircraft carrier in 1922.
Dr. Peter B. S. Lissaman created the first human-powered aircraft, the Gossamer Condor. This won him the Kremer prize in 1977.
They weren't as such. No more than the horse was invented to carry a cavalryman: Aircraft were adapted to be used in warfare in much the same way as many other things.
An ejection seat is used to rescue the crew of an aircraft in the case of an emergency by clearing the aircraft and then letting out a parachute. The first ejection seat was released in the 1940's.
aircraft ejection seat
Aircraft ejection seat
Ejection seats typically propel the pilot or occupant away from the aircraft at speeds ranging from 150 to 600 miles per hour, depending on the design and specific model of the seat. The exact speed can vary based on factors such as the aircraft's altitude and airspeed at the time of ejection.
Pilot has to maintain aircraft position almost vertical before ejection. Rest of the mechanisms are automatically done like fastening him to seat firmly with belts and requisite operations till he is separated from seat and main parachute opens. canopy jettison takes place in the beginning.
Ejection is exiting a fixed or rotor-wing aircraft
The ejection seat of a Eurofighter Typhoon can be activated in a matter of seconds, typically within 0.5 to 1 second after the pilot pulls the ejection handle. The seat employs a rocket-assisted system that propels it away from the aircraft rapidly, allowing for a swift escape in emergencies. This quick ejection mechanism is crucial for pilot survival in critical situations.
.The Martin Baker ejection seat system in the most often used ejection seat used in military aircraft among western nations... See the martin=baker web site.
Ejection seat may cost upto $100,000 per unit.
The German Luftwaffe and the Royal Swedish Air Force both tested and used ejection seats in the 1930's. -Due to lack of creditable documents it's hard to say exactly when they were invented, but certainly before WW2.
Heinkel He 280 in 1940 - although that aircraft didn't enter service as a fighter. The Heinkel He 219 Uhu (a multi-seat seat night fighter) was the first operational aircraft to be fitted with one, in 1942, followed later by the Heinkel He 162 (Germany) and the SAAB J21 (Sweden).
It is probable that no one knows this answer. Auto seat belts came into use well after seat belts had been in common usage in aircraft for decades and decades!