- 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: 397
10-year publication summary
|
31
|
42
|
43
|
37
|
32
|
38
|
31
|
41
|
25
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Gemological Institute of America, Inc. (gia) | 87 |
64 |
| de Beers UK Limited | 429 |
36 |
| Sarine Technologies Ltd. | 26 |
16 |
| Gemological Appraisal Association, Inc. | 27 |
9 |
| EllansaLabs Inc. | 49 |
9 |
| Goldway Technology Limited | 14 |
8 |
| Sahajanand Technologies Private Limited | 28 |
8 |
| Shenzhen DiKai Industrial Co., Ltd. | 20 |
8 |
| de Beers Centenary AG | 9 |
7 |
| Gemological Institute of America, Inc. | 136 |
7 |
| PARIKH HOLDINGS LLC, DBA Terra Cor Diamonds | 21 |
7 |
| Sarin Color Technologies Ltd. | 7 |
7 |
| Goldway Technology Limited | 11 |
7 |
| Jubilee Diamond Instrument (S) Pte.ltd. | 8 |
7 |
| The Australian National University | 199 |
6 |
| Jubilee Diamond Instrument (S) Pte. Ltd. | 6 |
6 |
| GemEx Systems, Inc. | 20 |
5 |
| D. Swarovski KG | 101 |
4 |
| Fundacio Institut de Ciencies Fotoniques | 133 |
4 |
| Institucio Catalana de Recerca I Estudis Avancats | 393 |
4 |
| Other owners | 168 |