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US2302874A
|
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Short wave dosimeter
|
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GB540068A
|
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Improved means for exploring local intensities in high-frequency electromagnetic fields
|
|
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|
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Process and apparatus for taking x-ray pictures of parts of the human body
|
|
GB488892A
|
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Process and apparatus for taking x-ray pictures of parts of the human body
|
|
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|
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Safety buckle
|
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|
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Apparatus for measuring the frequency of impulses
|
|
GB446639A
|
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Improvements in or relating to an apparatus for measuring the frequency of the pulse
|
|
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|
|
Pulse frequency and intensity meter
|
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US2081074A
|
|
Connection used in proceedings for measuring very high resistances
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|
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Current rectifier
|
|
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|
|
Device for measuring high resistances
|
|
GB206620A
|
|
Improvements in amplifying arrangements for telephonic currents
|
|
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|
|
Amplifier for subscribers' stations
|
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|
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Method and means for measuring electrical resistance
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|
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Relay for undulatory currents.
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