IPC Subgroup
E06B 3/22 Hollow frames
Introduced: September 1968
Last revised: January 2006
Full Title
Window sashes, door leaves, or like elements for closing openings; Layout of fixed or moving closures, e.g. windows; Features of rigidly-mounted outer frames relating to the mounting of wing frames > Wing frames not characterised by the manner of movement > Single frames > Constructions depending on the use of specified materials > of plastics > Hollow frames
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS, IN GENERAL; LADDERS
- Subclass:
- FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
Top Applicants
Top 10 applicants by patent filingsfor class E06, 2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 1,398
- YKK AP 1,252
- LIXIL CORPORATION 1,235
- SAINT-GOBAIN GLASS FR 1,133
- BUNKA SHUTTER COMPANY 839
- HUNTER DOUGLAS US 812
- SANKYOTATEYAMA 796
- SANWA SHUTTER CORPORATION 699
- VKR HOLDING DK 579
- VIEW US 557