4. Communications, electrical: acoustic wave systems and devices
  5. Signal transducers
  6. Underwater type

Igor Fridman

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Method of improving the overall operating efficiency of an...

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Pool cleaning method and apparatus

Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Reexamination Certificate

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Sensor system for measuring an electric potential signal of...

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
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Shock wave generator

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Submersible pool cleaner with integral rechargeable battery

Brushing – scrubbing – and general cleaning – Submerged cleaners with ambient flow guides
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Profile ID: LFUS-PAI-P-976660

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