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IPC Subgroup
E06B 3/968

characterised by the way the connecting pieces are fixed in or on the frame members

Introduced: January 1990

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 > Corner joints or edge joints for windows, doors, or the like frames or wings > using separate connecting pieces, e.g. T-connecting pieces > characterised by the way the connecting pieces are fixed in or on the frame members

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

Filing statistics

IPC E06B 3/968 belongs to the parent subclass E06B, which recorded 252,676 patent applications worldwide between 2013 and 2023. Annual filings grew from 14,786 in 2013 to 24,359 in 2023 (+65%), peaking at 33,082 applications in 2020. The most active applicants in class E06 are SGCC(STATE GRID CORPORATION OF CHINA) (1,398 applications), YKK AP (1,252 applications) and LIXIL CORPORATION (1,235 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • E06B 3/972 by increasing the cross-section of the connecting pieces, e.g. by expanding the connecting pieces with wedges
  • E06B 3/976 by deformation of the frame members
  • E06B 3/98 the connecting pieces being specially adapted for drawing the frame members towards each other

Top Applicants

Top 10 applicants by patent filingsfor class E06, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 1,398
  2. YKK AP 1,252
  3. LIXIL CORPORATION 1,235
  4. SAINT-GOBAIN GLASS FR 1,133
  5. BUNKA SHUTTER COMPANY 839
  6. HUNTER DOUGLAS US 812
  7. SANKYOTATEYAMA 796
  8. SANWA SHUTTER CORPORATION 699
  9. VKR HOLDING DK 579
  10. VIEW US 557