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The ballpoint pen was invented by Laszlo Biro in the 1930s, who was a Jewish-Hungarian journalist. During his time editing newspapers, he became very frustrated with the amount of smudging that the fountain pen caused. This made Biro determined to design a more practical pen.
In 1878, the carbon microphone was invented by David Edward Hughes, and later developed during the 1920s. Hughes's microphone was the early model for the various carbon microphones now in use. With the invention of the radio, new broadcasting microphones were created. The ribbon microphone was invented in 1942 for radio broadcasting. In 1964, Bell Laboratories researchers James West and Gerhard Sessler received patent no. 3,118,022 for the electroacoustic transducer, an electret microphone.