DIFF Subgroup
A24D 3/16 of inorganic materials
Introduced: January 1980
Full Title
Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes > Use of materials for tobacco smoke filters > of inorganic materials
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class A24,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIP MORRIS PRODUCTS CH 13,201
- NICOVENTURES TRADING GB 7,482
- KT & G CORPORATION KR 4,818
- JAPAN TOBACCO JP 4,636
- JT INTERNATIONAL CH 3,806
- CHINA TOBACCO YUNNAN INDUSTRIAL COMPANY 2,490
- CHINA TOBACCO HENAN INDUSTRIAL 2,453
- CHINA TOBACCO HUBEI INDUSTRIAL 2,344
- BRITISH AMERICAN TOBACCO (INVESTMENTS) GB 2,199
- SHENZHEN FIRST UNION TECHNOLOGY COMPANY 2,097
Top Applicants (CPC)
Class A24,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIP MORRIS PRODUCTS CH 13,994
- NICOVENTURES TRADING GB 7,744
- KT & G CORPORATION KR 4,857
- JAPAN TOBACCO JP 4,561
- JT INTERNATIONAL CH 3,946
- BRITISH AMERICAN TOBACCO (INVESTMENTS) GB 2,374
- ALTRIA CLIENT SERVICES US 2,122
- RAI STRATEGIC HOLDINGS US 2,061
- NICOVENTURES TRADING 1,940
- PHILIP MORRIS PRODUCTS 1,855