Granny's gotta be lying about her age. I found the following discrepancies:

Penicillin was discovered in 1928 by Alexander Fleming.

Frozen foods were developed by Clarence Birdseye in 1923.

Air conditioning is credited to Joel Houghton in 1850.

The first practical dishwasher is credited to Josephine Garis Cochran, who received her first patent on December 28, 1886.

The clothes dryer is credited in 1915.

I found these answers at www.askjeeves.com