- All sections
- E - Fixed constructions
- E04B - General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
- E04B 9/04 - Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, sheets or the like
Patent holdings for IPC class E04B 9/04
Total number of patents in this class: 571
10-year publication summary
|
35
|
74
|
84
|
51
|
73
|
69
|
53
|
74
|
45
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Armstrong World Industries, Inc. | 347 |
74 |
| AFI Licensing LLC | 204 |
69 |
| USG Interiors, LLC | 324 |
47 |
| Saint-Gobain Ecophon AB | 156 |
27 |
| CertainTeed Ceilings Corporation | 101 |
17 |
| Normalu | 141 |
13 |
| ROCKWOOL International A/S | 323 |
10 |
| Certainteed Canada, Inc. | 57 |
9 |
| Rockwool A/S | 753 |
9 |
| Turf Design, Inc. | 31 |
9 |
| Kvadrat Soft Cells A/S | 16 |
9 |
| Hunter Douglas Industries BV | 270 |
8 |
| Axis Lighting Inc. | 98 |
7 |
| Knauf Gips KG | 534 |
7 |
| United States Gypsum Company | 1019 |
7 |
| Beaulieu International Group NV | 78 |
7 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
6 |
| Nut Shell LLC | 14 |
5 |
| FACT Design, LLC | 5 |
5 |
| Apple Inc. | 50209 |
4 |
| Other owners | 222 |