Patent holdings for IPC class G04R 20/16

Total number of patents in this class: 3

10-year publication summary

2
0
0
0
0
0
0
0
0
0
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Principal owners for this class

Owner
All patents
This class
Nippon Telegraph and Telephone Corporation
15997
1
Council of Scientific & Industrial Research
1431
1
Sharp Kabushiki Kaisha
18605
1
Other owners 0