Electron discharge tubes for generating and amplifying electro- magnetic waves; electrical rectifying and gas discharge tubes; electron image intensifiers; radio communication apparatus and instruments; electrical pulse generators and transformers; electrical power supply units included in Class 9; semi-conductor devices and electronic amplifiers and oscillators constructed therefrom; electronic amplifiers, receivers and frequency mixers; crystal growing furnaces (experimental); automatic sputtering apparatus incorporating control instruments for use in the treatment of semi-conductor materials; chromatographs for use in the analysis of liquid and gaseous effluents; and nuclear magnetic resonance spectrometers; instruments and apparatus, all for testing the qualities of materials; X-ray apparatus for the inspection of metal products; apparatus for propagating guided electromagnetic waves; microwave apparatus for irradiating articles and products; filters, absorbers and circulators, all for electromagnetic waves; electrical and electronic measuring and recording instruments; digital computers and data storage processing apparatus; apparatus for recording and printing information from computers and from data processing apparatus; terrestrial, subterranean, aerial and oceanograph magnetometers; scientific and analytical apparatus, all included in Class 9; spectrometers, spectrophotometers and spectropolarimeters; scientific instruments and apparatus for setting and determining time standards; neutron generators; electrically driven vacuum pumps for laboratory use; vacuum gauges; electrical apparatus included in Class 9 incorporating vacuum pumps and vacuum gauges; particle accelerators; lasers; electrical furnaces included in Class 9; closed circuit television transmitting and receiving apparatus.;
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