Patent holdings for IPC class G01N 21/21

Total number of patents in this class: 1489

10-year publication summary

128
110
136
147
124
115
103
127
99
16
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
KLA-Tencor Corporation
2550
77
KLA Corporation
1406
45
J.A. Woollam Co., Inc.
157
34
Samsung Electronics Co., Ltd.
139551
33
Onto Innovation Inc.
354
28
Sony Corporation
31518
24
Korea Research Institute of Standards and Science
659
24
ASML Netherlands B.V.
7190
22
Halliburton Energy Services, Inc.
20466
15
FUJIFILM Corporation
28841
14
Ricoh Company, Ltd.
13230
14
Centre National de La Recherche Scientifique
10140
11
Koninklijke Philips N.V.
24106
11
Sony Group Corporation
12761
11
Applied Materials, Inc.
17808
10
Nxgen Partners IP, LLC
135
10
DEKA Products Limited Partnership
1715
9
Corning Incorporated
10145
8
Wisconsin Alumni Research Foundation
3838
8
Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
4821
8
Other owners 1073