- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/23 - Bi-refringence
Patent holdings for IPC class G01N 21/23
Total number of patents in this class: 210
10-year publication summary
|
22
|
17
|
22
|
12
|
11
|
16
|
13
|
10
|
8
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corning Incorporated | 10314 |
26 |
| Hinds Instruments, Inc. | 27 |
5 |
| FUJIFILM Corporation | 29586 |
4 |
| Koninklijke Philips N.V. | 24865 |
4 |
| Pathogen Systems, Inc., DBA Crystal Diagnostics Ltd. | 9 |
4 |
| Saint-Gobain Glass France | 3253 |
4 |
| S.D. Sight Diagnostics Ltd. | 104 |
4 |
| Shin-Etsu Chemical Co., Ltd. | 5687 |
3 |
| Keio University | 1104 |
3 |
| Luna Innovations Incorporated | 149 |
3 |
| Sumco Corporation | 1115 |
3 |
| Centre National de La Recherche Scientifique (cnrs) | 3103 |
3 |
| Mitsubishi Electric Corporation | 46449 |
2 |
| Microsoft Technology Licensing, LLC | 53910 |
2 |
| Hamamatsu Photonics K.K. | 4448 |
2 |
| National Institute of Advanced Industrial Science and Technology | 3793 |
2 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2185 |
2 |
| Cambridge Research & Instrumentation, Inc. | 21 |
2 |
| J.A. Woollam Co., Inc. | 153 |
2 |
| NUtech Ventures | 339 |
2 |
| Other owners | 128 |