Field briefing
F04C · Rotary-piston, or oscillating-piston, positive-displacement machines for liquids
Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; rotary-piston, or oscillating-piston, positive-displacement pumps. Patents classified in CPC F04C, part of Engines, machines, heating and lighting.
Dates, owners, statuses and filings come from the published records. Derived views are counted from them. Highlighted text is a plain-English AI reading, written from a patent's title and abstract. Legal statuses and expiry dates are estimates, not legal advice.
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Newest patents in F04C · Rotary-piston, or oscillating-piston, positive-displacement machines for liquids
2 patents imported from the European Patent Office; newest published 2026-08-12; most active companies: Altria Client Services LLC, Ningbo Mobo Compressor Co Ltd.
- ELECTRONIC CIGARETTE EP4789558A2, published 2026-08-12
- Small-size air cooling screw air compressor CN204025046U, published 2014-12-17
Most active companies
Counted over the newest 2 imported patents in this industry.
- Altria Client Services LLC 1 patent
- Ningbo Mobo Compressor Co Ltd 1 patent