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| 99760074 | HUG HYDRONICS | Hunt Utilities Group, LLC | — |
| 99757510 | HYDRO-LOCK SYSTEM | HydroLock System LLC | — |
| 99756259 | SUCCESS HYDROPONICS | Success Hydroponics LLC | — |
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| 99720831 | HYDROFULVIC | Haus of Innovation | — |
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| 99664998 | UNITED GREENS HYDROPONIC FARMING | Tony Dao | — |
| 99664088 | HYDROSTREAM VENOM | HydroStream, LLC | — |
| 99662345 | ZOMBIE HYDROPONICS | James Byrd | — |
| 99662249 | ZOMBIE HYDROPONICS | James Byrd | — |
| 99645158 | HYDRO PROOF | Rowell Chemical Corporation | — |
| 99636372 | HYDROSTACK | Modulayer LLC | — |
| 99623035 | HYDROMAX+ | Continental Border Corporation LLC | — |
| 99621210 | COLON HYDROTHERAPY AND WELLNESS CENTER | Colon Hydrotherapy and Wellness Center | — |
| 99614781 | BLUE WAVE HYDROFUEL ENERGY · HYDRATION · ENDURANCE | BLUE WAVE HYDROFUEL LLC | — |
| 99601106 | DUAL HYDROXYAPATITE | Grind Goods LLC | — |
| 99593424 | HYDROVENTURE NEW ADVENTURE WATER SPORT RENTAL LUQUILLO. PUERTO RICO EST. 2021 | New Adventure Water Sport Rental Inc. | — |
| 99575994 | HYDROGENX | ALADDIN CLEAN ENERGY CORPORATION | — |
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| 99572141 | HYDROCALM | MITOSWELL LLC | — |
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| 99565587 | HYDRON H2X | Hydron Desal Inc | — |
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| 99519409 | HYDRO HOOCH | Hydro Hooch LLC | — |
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| 99503296 | SUPERHYDRO H2 PURE | Luis Guillermo Trujillo Gutierrez | — |
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| 99441394 | JOURNAL OF GEOLOGICAL HYDROGEN | Association of Geological Hydrogen, Inc. | — |
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| 99400217 | HYDRODINE | Southeastern Medical Technologies, LLC | — |
| 99383888 | HYDROVERO | Hydrovero LLC | — |
| 99311104 | HYDROLIFE | Lifepro Fitness LLC | — |
| 99282778 | HYDROCORTONE | Fera Pharmaceuticals | — |
| 99253191 | GENHYDRO | GenHydro LLC | — |
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| 98685538 | HYDROPURE | IONFAUCET, INC. | — |
| 97797346 | MY HYDROGEN THERAPY | MHT LABS INC | — |
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| 88697891 | HYDRO COOLING MAT | Mark David Fuchs | 6084618 |
| 88396642 | HYDROLOGY BY ROVE | Tabletops Unlimited, Inc. | 6190689 |
| 88396638 | HYDROLOGY | Tabletops Unlimited, Inc. | 6190688 |
| 88332381 | HYDROPURE | Nutrabolics Inc. | 6177576 |
| 87960782 | DRYA HYDRODEFENSE | DC Alpine Partners, LLC | 6080727 |
| 86799144 | HYDROZ | D.C. PREMIER SALES, Inc. | 4977728 |
