Transitor Age of Hearing Aid (1 янв 1950 г. – 1 янв 1989 г.)
Описание:
Bell Telephone Labratories invented new technology for hearing aid. Now they had gotten very good in comparison to other hearing aids. This hearing aid was now more comfortable and less of a hassle for users to have. Fit more discreetly behind the ear.Добавлено на ленту времени:
Дата:
1 янв 1950 г.
1 янв 1989 г.
~ 39 years