- 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: 216
10-year publication summary
|
17
|
22
|
12
|
11
|
16
|
16
|
10
|
10
|
9
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corning Incorporated | 10500 |
26 |
| Hinds Instruments, Inc. | 25 |
5 |
| FUJIFILM Corporation | 30512 |
4 |
| Koninklijke Philips N.V. | 25832 |
4 |
| Pathogen Systems, Inc., DBA Crystal Diagnostics Ltd. | 10 |
4 |
| Saint-Gobain Glass France | 3240 |
4 |
| S.D. Sight Diagnostics Ltd. | 103 |
4 |
| Shin-Etsu Chemical Co., Ltd. | 6083 |
3 |
| Luna Innovations Incorporated | 138 |
3 |
| Sumco Corporation | 1108 |
3 |
| Centre National de La Recherche Scientifique (cnrs) | 3017 |
3 |
| Mitsubishi Electric Corporation | 47971 |
2 |
| Microsoft Technology Licensing, LLC | 54439 |
2 |
| Hamamatsu Photonics K.K. | 4669 |
2 |
| National Institute of Advanced Industrial Science and Technology | 3790 |
2 |
| The Arizona Board of Regents on Behalf of the University of Arizona | 2292 |
2 |
| Cambridge Research & Instrumentation, Inc. | 19 |
2 |
| de Beers UK Limited | 429 |
2 |
| J.A. Woollam Co., Inc. | 143 |
2 |
| Keio University | 1138 |
2 |
| Other owners | 135 |