4. Communications, electrical: acoustic wave systems and devices
  5. Echo systems
  6. Distance or direction finding

George J. Kren

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Acoustic method and apparatus for measuring micron and submicron

Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent

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Acoustic method and apparatus for measuring surfaces of wafers a

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent

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Darkfield inspection system having a programmable light...

Optics: measuring and testing – Inspection of flaws or impurities – Surface condition
Reexamination Certificate

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Darkfield inspection system having a programmable light...

Optics: measuring and testing – Inspection of flaws or impurities – Surface condition
Reexamination Certificate

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Fluid flow indicator and flow switch

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Profile ID: LFUS-PAI-P-99116

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