american electrical engineers russell and sigurd varian , [ ] which is used as an amplifier for high radio frequencies , from uhf up into the microwave range. low-power klystrons are used as oscillators in terrestrial microwave relay communications links, while high-power klystrons are used as output tubes...
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, guayule, chicle and similar natural gums, in primary forms or in plates, sheets or strip ₹ ₹ ₹ ₹ parts and accessories (other than covers , carrying cases and the like) suitable for use solely or principally with machines of headings to ₹ ₹ ₹ ₹ transmission apparatus for radio-broadcasting or television...
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as well as the first fully functional and complete all-electronic television system. [ ] [ ] farnsworth developed a television system complete with receiver and camera—which he produced commercially through the farnsworth television and radio corporation from to , in fort wayne, indiana. [ ] [ ] in later...
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