- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/45 - RefractivityPhase-affecting properties, e.g. optical path length using interferometric methodsRefractivityPhase-affecting properties, e.g. optical path length using Schlieren methods
Patent holdings for IPC class G01N 21/45
Total number of patents in this class: 1235
10-year publication summary
|
70
|
79
|
90
|
77
|
124
|
130
|
97
|
94
|
71
|
26
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hamamatsu Photonics K.K. | 4607 |
55 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11013 |
29 |
| Salvus, LLC | 39 |
18 |
| The General Hospital Corporation | 4824 |
16 |
| The Regents of the University of California | 20556 |
15 |
| Access Medical Systems, Ltd. | 79 |
15 |
| Trustees of Boston University | 980 |
15 |
| Centre National de La Recherche Scientifique | 10881 |
14 |
| FUJIFILM Corporation | 30277 |
14 |
| Georgia Tech Research Corporation | 2901 |
13 |
| bioMerieux | 891 |
12 |
| Halliburton Energy Services, Inc. | 21217 |
10 |
| Massachusetts Institute of Technology | 10201 |
10 |
| Shimadzu Corporation | 6306 |
10 |
| Toshiba Corporation | 12695 |
9 |
| Aryballe Technologies | 61 |
9 |
| DiaMonTech AG | 33 |
9 |
| Korea Advanced Institute of Science and Technology | 4575 |
8 |
| Purdue Research Foundation | 3853 |
8 |
| Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V. | 1824 |
8 |
| Other owners | 938 |