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CPC Subgroup
A61K 31/66

Phosphorus compounds

Full Title

Medicinal preparations containing organic active ingredients > Phosphorus compounds

7 direct subcodes

Child Classifications

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  • A61K 31/664 Amides of phosphorus acids
  • A61K 31/665 having oxygen as a ring hetero atom, e.g. fosfomycin
  • A61K 31/67 having sulfur as a ring hetero atom
  • A61K 31/675 having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate

Top Applicants

Top 10 applicants by patent filingsfor 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