After his death in 1910 , his son William Demant took over .
The William Demant Holding Group was founded in 1904 by Hans Demant , under the name Oticon .
After Hans Demant 's death in 1910 , Hans Demant 's son William Demant Holding Group   took over .
The William Demant Holding Group was founded in 1904 by Hans Demant , under the name Oticon .