GB571912A
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Improvements in or relating to liquid lenses
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US2145686A
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Arrangement for the execution of deep x-ray therapy
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GB262829A
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Apparatus for the production of quantities of gas having an excess of positive or negative ions
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GB253090A
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Apparatus for analysing substances by means of roentgen or cathode rays
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GB252207A
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Apparatus for the quantitative analysis of substances with the aid of roentgen or cathode rays
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GB252206A
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Apparatus for analysing substances by means of rontgen or cathode rays
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US1720172A
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Electron-discharge tube and method of manufacturing the same
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GB246909A
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Improvements in and relating to apparatus for the conversion of alternating current into high tension continuous current
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US1732715A
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Electromagnetic induction apparatus
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GB165435A
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Improvements in or relating to high tension electric transformers
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US1372653A
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Electrical transformer system
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