| MICROFLUIDIZER 1661827 · TMA914405 | Microfluidics International Corporation | 7 Machines | Registered | 2015 |
| MICROBUDDIES 2149291 | Good Gaming, Inc. | 9 Electronics36 Finance42 Science | Pending | 2021 |
| MICROBUILDS 2024260 · TMA1162008 | Microbuilds Inc. | 36 Finance37 Construction42 Science | Registered | 2023 |
| MICROFINISH 1722441 · TMA946074 | Thetford LLC | 4 Oils | Registered | 2016 |
| MICROFUSION 1187288 · TMA644054 | KURARAY CO. LTD. | 18 Leather25 Clothing | Registered | 2005 |
| MICROFIBRES 0760892 · TMA446060 | MICROFIBRES, INC. | 24 Textiles | Registered | 1995 |
| MICROFLUTE 0583391 · TMA338279 | INTEPLAST BAGS AND FILMS CORPORATION | 16 Paper17 Rubber | Registered | 1988 |
| MICROFRANCE 2108656 · TMA1191815 | Integra LifeSciences (Ireland) Limited | 10 Medical | Registered | 2023 |
| MICROBRICK 2002341 · TMA1145338 | Siliconix Incorporated | 9 Electronics | Registered | 2022 |
| MICROPULS 1924728 · TMA1166269 | RÜBIG GESELLSCHAFT m.b.H & Co. KG. a legal entity | 7 Machines9 Electronics37 Construction+2 | Registered | 2023 |
| MICROFLEX 1865824 · TMA1050204 | Shure Incorporated | 9 Electronics | Registered | 2019 |
| MICROFLOW 1793791 · TMA1003710 | Cloud Software Group, Inc. | 42 Science | Registered | 2018 |
| MICROFINE 1743808 · TMA1070799 | Haddenham Healthcare Limited | 5 Pharmaceuticals9 Electronics10 Medical+2 | Registered | 2020 |
| MICROFUN 1723121 · TMA943985 · design | an individual | 9 Electronics | Registered | 2016 |
| MICROFARMING 1681934 · TMA952946 | Canadian Agra Holdings Inc. | 35 Advertising36 Finance41 Education | Registered | 2016 |
| MICROFIND 1519989 · TMA870892 · design | an individual | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2014 |
| MICROFILL 1503177 · TMA846413 | Prollenium Medical Technologies, Inc. | 10 Medical | Registered | 2013 |
| MICROFINE 1486205 · TMA804812 | an individual | 21 Housewares | Registered | 2011 |
| MICROBLUE 1416561 · TMA794285 · design | COBRA ELECTRONICS CORPORATION | 9 Electronics | Registered | 2011 |
| MICROPLACE 1377151 · TMA786337 | Microplace, Inc. | 36 Finance | Registered | 2011 |
| MICROBIOTIC 1270717 · TMA676112 | Guinot, a French societe par actions simplifiee also known as a simple joint stock company | 3 Cosmetics | Registered | 2006 |
| MICROFLEX 1236899 · TMA731404 | MARK'S WORK WEARHOUSE LTD. | 25 Clothing | Registered | 2008 |
| MICROBLEND 1199511 · TMA632547 | REXIUS FOREST BY-PRODUCTS, INC. | 1 Chemicals | Registered | 2005 |
| MICROBLOCK 1169766 · TMA662023 | Alcon Inc. | 9 Electronics | Registered | 2006 |
| MICROFLEX 1163771 · TMA606988 | EPICOR INDUSTRIES, INC. (a Delaware corporation) | 6 Metal | Registered | 2004 |