This was a major innovation in publishing at the time.

The rise of field guides for the identification of birds was another major innovation.

The elevator up from the parking area was a major innovation at the time.

The swinging rear door formed the basis of the patent claim, and was a major innovation in the evolution of the modern shopping cart.

Martin's second major innovation, and arguably the more important, of the period 1915-1930 was the dreadnought guitar.