Hitachi Metals Ltd patents

Hitachi Metals Ltd holds 2,343 patents in our database, with recent filings and technology areas summarized below.

Company patent statistics
MetricValue
Total patents2,343
Recent patents80
First publicationJan 1, 2015
Latest publicationNov 18, 2025

Filing trend

Year-over-year patent counts for this assignee.

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
2015345
2016376
2017321
2018255
2019273
2020241
2021189
2022195
202395
202440
202513
Browse patents by year
YearPatents
2015345
2016376
2017321
2018255
2019273
2020241
2021189
2022195
202395
202440
202513

Recent patents

Latest publications where this party is an assignee.

Notable patents

Representative or frequently cited publications from precomputed assignee stats.

Top CPC classifications

Most common classification codes in this portfolio.

Top CPC codes by patent count
CPCPatents
C22C38/00151
C22C38/02150
H01B7/0045125
C22C38/002124
C22C38/06119

Technology areas

Mapped technology topics for this assignee.

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Frequently asked questions

Answers are generated from the same data shown on this page.

How many patents does Hitachi Metals Ltd have in patentsdb?
Hitachi Metals Ltd is linked to 2,343 publications as assignee in our database.
What technology areas does Hitachi Metals Ltd patent most?
Top mapped technology areas by patent count: Electricity (1,542); Chemistry & Metallurgy (936); Operations & Transport (886).
Is Hitachi Metals Ltd's patent activity growing?
In our data, assignee counts were 40 in 2024 and 13 in 2025 (lower year over year).
What are recent patents assigned to Hitachi Metals Ltd?
See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.