| A-DEC 1132219 · TMA621761 · design | A-Dec, Inc. | 9 Electronics10 Medical11 Lighting+1 | Registered | 2004 |
| I-DEC 2299197 | Owner not listed | 10 Medical | Pending | 2023 |
| A-DEC 2023446 | A-Dec, Inc. | 3 Cosmetics5 Pharmaceuticals9 Electronics+2 | Pending | 2020 |
| AER-DEC 2005704 · TMA1281910 | SLOAN VALVE COMPANY | 11 Lighting21 Housewares | Registered | 2025 |
| DEC-TEC 1940147 · TMA1175307 · design | SKYLINE BUILDING SYSTEMS INC. | 1 Chemicals6 Metal19 Building | Registered | 2023 |
| DEC-TEC 0719170 · TMA427895 | SKYLINE BUILDING SYSTEMS INC. | 1 Chemicals19 Building | Registered | 1994 |
| DEC-KING 2035847 · TMA1269495 | ILLINOIS TOOL WORKS INC. | 6 Metal19 Building | Registered | 2024 |
| DEC STAR 1664254 · TMA940316 | Regal Beloit America, Inc. | 7 Machines9 Electronics11 Lighting | Registered | 2016 |
| EASI-DEC 1579759 · TMA875042 | Easi-Dec Access Systems Ltd | 6 Metal7 Machines9 Electronics+2 | Registered | 2014 |
| DIEC DEC 1534455 · TMA845215 · design | Dragontex Import and Export Corporation | 6 Metal11 Lighting19 Building+4 | Registered | 2013 |
| INTER-DEC 1747431 · TMA948785 | COLLÈGE LASALLE INTERNATIONAL INC. | 6 Metal9 Electronics14 Jewellery+4 | Registered | 2016 |
| A-DEC 300 1409962 · TMA781585 | A-Dec, Inc. | 10 Medical | Registered | 2010 |
| A-DEC 500 1185075 · TMA631780 | A-Dec, Inc. | 10 Medical20 Furniture | Registered | 2005 |
| COMPRI DEC 1878024 · TMA1078722 | Shilmann Rocbit LLC | 17 Rubber | Registered | 2020 |
| DEC-A-CAKE 0485719 · TMA276711 | B&G Foods North America, Inc. a Delaware corporation | 30 Coffee | Registered | 1983 |
| A-DEC XC10 2335238 | A-Dec, Inc. | 7 Machines | Pending | 2024 |
| DEC-OR-POST 0717328 · TMA422763 | Oldcastle Building Products Canada, Inc./Les Matériaux de Construction Oldcastle Canada, Inc. | 19 Building | Registered | 1994 |
| A-DEC INSPIRE 1686713 · TMA974247 | A-Dec, Inc. | 20 Furniture | Registered | 2017 |
| A-DEC PROTECT 1988050 | A-Dec, Inc. | 3 Cosmetics5 Pharmaceuticals10 Medical+1 | Pending | 2019 |
| INTER DEC COLLEGE 1478255 · TMA804586 · design | COLLÈGE LASALLE INTERNATIONAL INC. | 6 Metal9 Electronics14 Jewellery+4 | Registered | 2011 |
| COLLEGE INTER DEC 1478250 · TMA808502 · design | COLLÈGE LASALLE INTERNATIONAL INC. | 6 Metal9 Electronics14 Jewellery+4 | Registered | 2011 |
| BERNAT MAKER HOME DEC 1765165 · TMA1044108 | Spinrite Inc. | 23 Yarns | Registered | 2019 |
| GLOBAL DEC-K-ING SYSTEMS 1793159 · TMA980206 · design | COAST SUNDECKS WATERPROOFING LTD. | 1 Chemicals19 Building | Registered | 2017 |
| GLOBAL DEC-K-ING SYSTEMS 1992237 · design | an individual | 6 Metal19 Building37 Construction | Pending | 2019 |
| DEC-TEC DIY PEEL. STICK. EASY. 1965352 · TMA1167479 · design | SKYLINE BUILDING SYSTEMS INC. | 1 Chemicals6 Metal19 Building | Registered | 2023 |