Philo T. FarnsworthUSPhilo T. FarnsworthUnited StatesSeptember 21, 1983Face value 20 cents Commemorative issue American inventors✓ Owned♡ Wishlist
Edwin ArmstrongUSEdwin ArmstrongUnited StatesSeptember 21, 1983Face value 20 cents Commemorative issue American inventors✓ Owned♡ Wishlist
Charles SteinmetzUSCharles SteinmetzUnited StatesSeptember 21, 1983Face value 20 cents Commemorative issue American inventors✓ Owned♡ Wishlist
American inventorsUSAmerican inventorsUnited StatesSeptember 21, 1983Face value 20 cents Commemorative issue American inventors✓ Owned♡ Wishlist