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PCE
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DIFF Subgroup
B65G 33/14

comprising a screw or screws enclosed in a tubular housing

Introduced: September 1968

Full Title

Screw or rotary spiral conveyors > for fluent solid materials > comprising a screw or screws enclosed in a tubular housing

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • B65G 33/16 with flexible screws operating in flexible tubes IPC+CPC Available in IPC and CPC
  • B65G 33/18 with multiple screws in parallel arrangements IPC+CPC Available in IPC and CPC
  • B65G 33/20 the housing being rotatable relative to the screw IPC+CPC Available in IPC and CPC
  • B65G 33/22 with means for retarding material flow at the delivery end of the housing IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B65,2013–2023, worldwide · Source: EPO PATSTAT

  1. CANON 3,755
  2. SGCC(STATE GRID CORPORATION OF CHINA) 3,721
  3. YOSHINO KOGYOSHO COMPANY 3,659
  4. DNP (DAINIPPON PRINTING COMPANY) 3,573
  5. KRONES DE 3,114
  6. P&G (PROCTER & GAMBLE COMPANY) US 2,777
  7. TOPPAN PRINTING COMPANY 2,720
  8. SEIKO EPSON CORPORATION 2,574
  9. KYOCERA DOCUMENT SOLUTIONS 2,371
  10. RICOH COMPANY 2,349

Top Applicants (CPC)

Class B65,2013–2023, worldwide · Source: EPO PATSTAT

  1. P&G (PROCTER & GAMBLE COMPANY) US 3,369
  2. KRONES DE 3,304
  3. TETRA LAVAL HOLDINGS & FINANCE CH 2,227
  4. CANON JP 2,051
  5. AUTOSTORE TECHNOLOGY NO 1,731
  6. GPI (GRAPHIC PACKAGING INTERNATIONAL) US 1,707
  7. CANON 1,693
  8. G.D IT 1,678
  9. MURATA MACHINERY JP 1,664
  10. DAIFUKU COMPANY JP 1,654