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IPC Subgroup
F28F 13/1

by imparting a pulsating motion to the flow, e.g. by sonic vibration

Introduced: September 1968

Last revised: January 2006

Full Title

Arrangements for modifying heat transfer, e.g. increasing, decreasing > by affecting the pattern of flow of the heat-exchange media > by imparting a pulsating motion to the flow, e.g. by sonic vibration

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
HEAT EXCHANGE IN GENERAL
Subclass:
DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION

Top Applicants

Top 10 applicants by patent filingsfor class F28, 2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO SYSTEMES THERMIQUES FR 1,902
  2. MITSUBISHI ELECTRIC CORPORATION JP 1,327
  3. GREE ELECTRIC APPLIANCES 1,152
  4. MAHLE INTERNATIONAL DE 999
  5. ALFA LAVAL SE 960
  6. HANON SYSTEMS KR 917
  7. DENSO CORPORATION 905
  8. DENSO CORPORATION JP 802
  9. CHINESE ACADEMY OF SCIENCES 787
  10. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762