Marvin Pipkin, inventor of the frosted light bulb

When Pipkin went to work for General Electric he was assigned the “impossible” task of finding a way to frost electric light bulbs on the inside without weakening the strength of the glass. This demonstrated Pipkin’s innovation of a two-step acid etching process for frosting a glass light bulb interior, and creating a strong glass globe. Besides the frosted light bulb, Pipkin invented or improved many other products during his career with General Electric, including the 100 watt Deluxe-White bulb of the soft light bulb series.

Source: en.wikipedia.org