Alexander Graham Bell, Chichester Bell, and Charles Tainter of the Volta laboratory obtained several patents for a commercial talking machine which was the graphaphone. The graphaphone was based on Thomas 's phonograph. The stylus for the graphaphone was more of a cutting tool and the tinfoil was replaced with more durable wax cylinders. These changes made the machine easier to use and the play back was much clearer. Edison was asked to join the 3, but he did not.