- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 21/87 - Investigating jewels
Patent holdings for IPC class G01N 21/87
Total number of patents in this class: 391
10-year publication summary
|
35
|
30
|
36
|
39
|
35
|
32
|
37
|
31
|
39
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Gemological Institute of America, Inc. (gia) | 78 |
59 |
| de Beers UK Limited | 435 |
33 |
| Sarine Technologies Ltd. | 32 |
15 |
| Goldway Technology Limited | 17 |
11 |
| Gemological Appraisal Association, Inc. | 27 |
9 |
| EllansaLabs Inc. | 52 |
9 |
| Sahajanand Technologies Private Limited | 27 |
8 |
| de Beers Centenary AG | 9 |
7 |
| Gemological Institute of America, Inc. | 138 |
7 |
| Sarin Color Technologies Ltd. | 8 |
7 |
| Shenzhen DiKai Industrial Co., Ltd. | 15 |
7 |
| Goldway Technology Limited | 11 |
7 |
| Jubilee Diamond Instrument (S) Pte.ltd. | 8 |
7 |
| The Australian National University | 192 |
6 |
| GemEx Systems, Inc. | 23 |
6 |
| PARIKH HOLDINGS LLC, DBA Terra Cor Diamonds | 20 |
6 |
| Universita degli Studi di Milano-bicocca | 155 |
6 |
| Jubilee Diamond Instrument (S) Pte. Ltd. | 6 |
6 |
| Galatea Ltd. | 6 |
5 |
| D. Swarovski KG | 103 |
4 |
| Other owners | 166 |