4. H - Electricity
  5. 01
  6. J

Leonard M. Welter

H - Electricity – 01 – J

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Electron microscope

H - Electricity – 01 – J
Patent

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Electron microscope beam tube

H - Electricity – 01 – J
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Field emission electron gun

H - Electricity – 01 – J
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Field emission gun improvement

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Field emission scanning microscope display

H - Electricity – 01 – J
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