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IPC Subgroup
B27M 3/1

of airscrew blades

Introduced: September 1968

Last revised: January 2006

Full Title

Manufacture or reconditioning of specific semi-finished or finished articles > of airscrew blades

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
Subclass:
WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES; MANUFACTURE OF SPECIFIC WOODEN ARTICLES

Related Keywords

making wooden blades of AIRSCREWSmaking wooden air-screw BLADESmaking PROPELLERS from wood

Top Applicants

Top 10 applicants by patent filingsfor class B27, 2013–2023, worldwide · Source: EPO PATSTAT

  1. NANJING FORESTRY UNIVERSITY 960
  2. ROBERT BOSCH DE 762
  3. HOMAG DE 384
  4. HARBIN ARTS AND CRAFTS COMPANY 350
  5. NORTHEAST FORESTRY UNIVERSITY 343
  6. SWISS KRONO TEC CH 304
  7. MAKITA CORPORATION 298
  8. DIEFFENBACHERMASCHINEN- UND ANLAGENBAU DE 296
  9. VAELINGE INNOVATION SE 287
  10. HUSQVARNA SE 282