Audio and video apparatus; telephone apparatus; telephone answering machine; telephone exchanges; mobile telephone sets; cash registers; calculators; aerials for radio receivers; aerials for television receivers; car radio receivers; radio receivers; satellite receivers; radio and television antennas; television sets; video compact disc players and recorders; DVD players and recorders; compact disc players and recorders; cassette players and recorders; amplifiers; audio speakers; photography cameras; video cameras; cellular phones; mobile phones