Klein is survived by his wife Betty , their three children and four grandchildren . Allen Klein , who inked contracts for dozens of musicians , dies at age 77 . Klein 's company , ABKCO , built up catalog of copyrights to more than 2,000 songs . He was a pioneer in the recording industry and helped create the modern rock genre with his innovative use of technology ( including tape delay ) on records that were released before vinyl became popular.
Allen Klein , who inked contracts for dozens of musicians , dies at age 77 . Klein 's company , ABKCO , built up catalog of copyrights to more than 2,000 songs . He was a pioneer in the recording industry and helped create the modern rock genre with his innovative use of technology ( including tape delay ) on records that were released before vinyl became popular.