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CPC Subgroup
E06B 3/972

by increasing the cross-section of the connecting pieces, e.g. by expanding the connecting pieces with wedges (E06B3/976 takes precedence)

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 (E06B5/00 takes precedence; shutters or the like E06B9/00; glass panes C03) > Corner joints or edge joints for windows, doors, or the like frames or wings > using separate connection pieces, e.g. T-connection pieces (E06B3/9604 - E06B3/9636 and E06B3/984 - E06B3/99 take precedence) > characterised by the way the connecting pieces are fixed in or on the frame members > by increasing the cross-section of the connecting pieces, e.g. by expanding the connecting pieces with wedges (E06B3/976 takes precedence)

Filing statistics

CPC E06B 3/972 belongs to the parent subclass E06B, which recorded 94,488 patent applications worldwide between 2013 and 2023. Annual filings declined from 6,576 in 2013 to 6,204 in 2023 (-6%), peaking at 11,587 applications in 2018. The most active applicants in class E06 are SAINT-GOBAIN GLASS (1,388 applications), HUNTER DOUGLAS (874 applications) and VIEW (763 applications).

Source: EPO PATSTAT, worldwide filings

1 direct subcode

Child Classifications

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Top Applicants

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

  1. SAINT-GOBAIN GLASS FR 1,388
  2. HUNTER DOUGLAS US 874
  3. VIEW US 763
  4. VKR HOLDING DK 627
  5. GUARDIAN GLASS US 460
  6. PANASONIC INTELLECTUAL PROPERTY JP 426
  7. LG ELECTRONICS KR 406
  8. SOMFY ACTIVITES FR 368
  9. SGCC(STATE GRID CORPORATION OF CHINA) 353
  10. AGC GLASS EUROPE BE 350