Patent Theme
Biological Fluid & Air Filtration
Systems and materials designed for purifying biological fluids (like blood) or capturing airborne particles (like respiratory droplets) using membranes, filters, or specialized coatings.
6,915 US filings from 2,134 companies since 2023 · 2023: 1,875 · 2024: 2,235 · 2025: 1,967 · 2026 YTD: 838
Sterilization & Biocompatible Materials
Top companies
Ranked by filings in this theme since 2023. 2026 is partial.
| # | Company | Since 2023 | 2023 | 2024 | 2025 | 2026 YTD | YoY |
|---|
| 1 | Donaldson Company, Inc. | 256 | 64 | 96 | 74 | 22 | -22.9% |
| 2 | MANN+HUMMEL GmbH | 192 | 37 | 67 | 53 | 35 | -20.9% |
| 3 | ResMed Pty Ltd | 187 | 54 | 63 | 51 | 19 | -19.0% |
| 4 | BAXTER INTERNATIONAL INC. | 137 | 34 | 36 | 46 | 21 | +27.8% |
| 5 | BAXTER HEALTHCARE SA | 135 | 34 | 35 | 45 | 21 | +28.6% |
| 6 | Fenwal, Inc. | 113 | 30 | 41 | 33 | 9 | -19.5% |
| 7 | GAMBRO LUNDIA AB | 109 | 22 | 37 | 34 | 16 | -8.1% |
| 8 | SAMSUNG ELECTRONICS CO., LTD. | 87 | 20 | 26 | 30 | 11 | +15.4% |
| 9 | FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH | 83 | 21 | 26 | 26 | 10 | 0.0% |
| 10 | LG ELECTRONICS INC. | 67 | 21 | 19 | 19 | 8 | 0.0% |
| 11 | Fisher & Paykel Healthcare Limited | 65 | 12 | 23 | 18 | 12 | -21.7% |
| 12 | ENTEGRIS, INC. | 59 | 15 | 26 | 15 | 3 | -42.3% |
| 13 | Fresenius Medical Care Holdings, Inc. | 59 | 16 | 15 | 18 | 10 | +20.0% |
| 14 | 3M Innovative Properties Company | 56 | 15 | 18 | 17 | 6 | -5.6% |
| 15 | Hollingsworth & Vose Company | 46 | 13 | 15 | 14 | 4 | -6.7% |
| 16 | Microjet Technology Co., Ltd. | 46 | 5 | 13 | 17 | 11 | +30.8% |
| 17 | K&N Engineering, Inc. | 44 | 10 | 12 | 18 | 4 | +50.0% |
| 18 | Cummins Filtration IP, Inc. | 43 | 17 | 16 | 10 | · | -37.5% |
| 19 | TERUMO KABUSHIKI KAISHA | 43 | 15 | 8 | 12 | 8 | +50.0% |
| 20 | NxStage Medical, Inc. | 42 | 10 | 18 | 13 | 1 | -27.8% |
| 21 | Terumo BCT, Inc. | 42 | 9 | 10 | 15 | 8 | +50.0% |
| 22 | CORNING INCORPORATED | 40 | 12 | 12 | 11 | 5 | -8.3% |
| 23 | Nikkiso Company Limited | 40 | 3 | 24 | 12 | 1 | -50.0% |
| 24 | EMD Millipore Corporation | 39 | 16 | 15 | 6 | 2 | -60.0% |
| 25 | Cummins Filtration Inc. | 38 | 9 | 14 | 12 | 3 | -14.3% |