4. Rotary kinetic fluid motors or pumps
  5. Axially opposed working fluid paths to or from runner
  6. Pump impeller means

Alexander Greenspan

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Gas blower

Rotary kinetic fluid motors or pumps – Axially opposed working fluid paths to or from runner – Pump impeller means
Patent

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Mining and demolition tool

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Plural cutting edges on tooth – pick – or bit
Reexamination Certificate

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Rotatable assembly

Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Turbo machine
Patent

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Therapy device having a rotatably tiltable platform

Exercise devices – Support for entire body of user – Swivelled foot platform
Reexamination Certificate

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