Edison continued to improve this design and by 4 November 1879, filed for a US patent for an electric lamp using "a carbon filament or strip coiled and connected ... to platina contact wires." Although the patent described several ways of creating the carbon filament including using "cotton and linen thread, wood splints, papers coiled in various ways," Edison and his team later discovered that a carbonized bamboo filament could last more than 1200 hours.
Eisenhower defeated Democratic candidate Adlai Stevenson II in a landslide, with an electoral margin of 442 to 89, marking the first Republican return to the White House in 20 years. He also brought a Republican majority in the House, by eight votes, and in the Senate, evenly divided with Vice President Nixon providing Republicans the majority.
The 1980 United States presidential election was the 49th quadrennial presidential election. It was held on November 4, 1980. Republican nominee Ronald Reagan defeated incumbent Democrat Jimmy Carter. Due to the rise of conservativism following Reagan's victory, some historians consider the election to be a realigning election that marked the start of the "Reagan Era".