4. Rotary expansible chamber devices
  5. Working member has planetary or planetating movement
  6. Helical working member, e.g., scroll

Alexander Lifson

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Acoustic attenuator, well logging apparatus and method of well l

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Automated drive for fan and refrigerant system

Refrigeration – Automatic control – Of external fluid or means
Reexamination Certificate

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Combined expansion device and four-way reversing valve in...

Refrigeration – Reversible – i.e. – heat pump
Reexamination Certificate

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Compressor

Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate

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Compressor control at voltage and frequency extremes of...

Pumps – Condition responsive control of pump drive motor – In response to pump speed
Reexamination Certificate

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Profile ID: LFUS-PAI-P-504494

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