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DIFF Subgroup
A61F 13/535

inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ( A61F13/537 take precedence)

Introduced: January 2000

Title

Titles differ between systems:

IPC: inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes

CPC: inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ( A61F13/537 take precedence)

Full Title

Full titles differ between systems:

IPC:

Bandages or dressings; Absorbent pads > Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators > characterised by the absorbing medium > having an inhomogeneous composition through the thickness of the pad > inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes

CPC:

Bandages or dressings (radioactive dressings ); Absorbent pads > Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators > characterised by the absorbing medium (A61F13/20 takes precedence) > having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence) > inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes ( A61F13/537 take precedence)

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

IPC defines codes here since 2000.

Child Classifications

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  • A61F 13/536 having discontinuous areas of compression since 2000 IPC+CPC Available in IPC and CPC
  • A61F 2013/5355 2nd only CPC only CPC only

Top Applicants

Top Applicants (IPC)

Class A61,2013–2023, worldwide · Source: EPO PATSTAT

  1. PHILIPS ELECTRONICS NL 18,523
  2. NOVARTIS CH 14,253
  3. COVIDIEN US 13,953
  4. ROCHE CH 12,005
  5. CHINESE ACADEMY OF SCIENCES 11,955
  6. UNIVERSITY OF CALIFORNIA US 11,692
  7. HARVARD UNIVERSITY US 11,596
  8. L'OREAL FR 11,593
  9. P&G (PROCTER & GAMBLE COMPANY) US 11,297
  10. OLYMPUS CORPORATION JP 9,594

Top Applicants (CPC)

Class A61,2013–2023, worldwide · Source: EPO PATSTAT

  1. PHILIPS ELECTRONICS NL 20,621
  2. NOVARTIS CH 15,792
  3. ROCHE CH 14,303
  4. COVIDIEN US 13,862
  5. HARVARD UNIVERSITY US 13,454
  6. UNIVERSITY OF CALIFORNIA US 12,798
  7. P&G (PROCTER & GAMBLE COMPANY) US 12,140
  8. L'OREAL FR 11,800
  9. OLYMPUS CORPORATION JP 9,894
  10. BOSTON SCIENTIFIC SCIMED US 9,513