Technical publications; technical handbooks; technical instructional and teaching material not included in other classes; all being goods included in Class 16

Philosophic instruments, scientific instruments and apparatus for useful purposes included in this class; instruments and apparatus for teaching; electric cables and flexibles; telephone and telegraph equipment and apparatus; printing telegraph equipment and apparatus; manual and automatic telephone exchange equipment and apparatus; apparatus and equipment for railway control systems; apparatus and equipment for signalling, indicating and remote control systems of all kinds (including D.C. Bias control of special loads on power supply systems); line transmission equipment and apparatus including carrier frequency telephone systems; radio station speech input equipment and apparatus; radio transmitters and receivers of all kinds; radiogramophones; television transmitters and receivers; radio navigation equipment and apparatus; high frequency heating equipment and apparatus; vacuum tubes; Rectifiers and rectifier equipment in class 9; home battery chargers; talking machines, electrical invertors, convertors and regulators; testing equipment and apparatus associated with all above goods and parts and accessories therefor included in this class,

Television equipment both transmitting and receiving, and parts thereof included in this class,