Patent holdings for IPC class B28B 3/20

Total number of patents in this class: 352

10-year publication summary

28
41
28
33
30
17
20
6
9
1
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
NGK Insulators, Ltd.
4792
61
Corning Incorporated
10125
48
Ibiden Co., Ltd.
1736
22
Hitachi Metals, Ltd.
2021
15
Denso Corporation
23769
12
Sumitomo Chemical Company, Limited
8988
9
Robert Bosch GmbH
41786
5
Shildan Inc.
14
4
Kyocera Corporation
13344
3
24M Technologies, Inc.
245
3
Holcim Technology Ltd.
995
3
Putzmeister Engineering GmbH
337
3
Saint-Gobain Centre de Recherches et d'Etudes Europeen
486
3
SANYO Chemical Industries, Ltd.
475
3
The School Corporation Kansai University
160
3
Shenzhen Tatfook Technology Co., Ltd.
102
3
Mantec Technical Ceramics Limited
4
3
XtreeE
14
3
BASF SE
20432
2
Toyota Motor Corporation
30455
2
Other owners 142