Harburg, the youngest of four surviving children (out of ten), was born Isidore Hochberg on the Lower East Side of New York City on April 8, 1896. His parents, Lewis Hochberg and Mary Ricing, were Yiddish-speaking Orthodox Jews who had emigrated from Russia.  He later adopted the name Edgar Harburg, and came to be best known as Edgar "Yip" Harburg. He attended Townsend Harris High School, where he and Ira Gershwin, who met over a shared fondness for Gilbert and Sullivan, worked on the school paper and became lifelong friends. According to his son Ernie Harburg, Gilbert and Irish dramatist George Bernard Shaw taught his father, a "democratic socialist, [and] sworn challenger of all tyranny against the people, that 'humor is an act of courage' and dissent".  After World War I, Harburg returned to New York and graduated from City College (later part of the City University of New York), which Ira Gershwin had initially attended with him, in 1921. After Harburg married and had two children, he started writing light verse for local newspapers. He became a co-owner of Consolidated Electrical Appliance Company, but the company went bankrupt following the crash of 1929, leaving Harburg "anywhere from $50,000 - $70,000 in debt," which he insisted on paying back over the course of the next few decades. At this point, Harburg and Ira Gershwin agreed that Harburg should start writing song lyrics.  Gershwin introduced Harburg to Jay Gorney, who collaborated with him on songs for an Earl Carroll Broadway review (Earl Carroll's Sketchbook): the show was successful and Harburg was engaged as lyricist for a series of successful revues, including Americana in 1932, for which he wrote the lyrics of "Brother, Can You Spare a Dime?" to the tune of a lullaby Gorney had learned as a child in Russia. This song swept the nation, becoming an anthem of the Great Depression.  Harburg was a staunch critic of religion and an atheist. He wrote a poem entitled "Atheist" that summarized his views on god and religion.

Answer this question "How long was he co owner?" by extracting the answer from the text above.
the company went bankrupt following the crash of 1929,