Answer
Hi,
Technology applied to automotive was simple. Cars in both the 1920s and 1950s had four wheels and carried people from places to places. However, the shape of the cars in the 1950s was build up and more stylish as compared to cars in the 1920s.
Telephone technology in the 1920s and 1950s both could call out and get called in. The difference was in size where the 1950s model was short with a chubby body where as those in the 1920s were long and with a skinny body.
Technology for wash machines in the 1920s and 1950s both achieved the goal of washing and cleaning cloths and only women were involved in both times. However, the difference in both body structure was visible to the machines of 1950s that resembled a big box with a window to view cloths.
Hope this Helps!