4. Brushing, scrubbing, and general cleaning
  5. Machines
  6. With air blast or suction

Joseph A. Fester

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Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate

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Vacuum cleaner with multiple cyclonic dirt separators and...

Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Reexamination Certificate

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