PatentsDB

Hitachi Power Semiconductor Device Ltd patents

Hitachi Power Semiconductor Device Ltd holds 110 patents in our database, with recent filings and technology areas summarized below.

Company patent statistics
MetricValue
Total patents110
Recent patents36
First publicationMar 26, 2015
Latest publicationMar 31, 2026

Filing trend

Year-over-year patent counts for this assignee.

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
20158
201610
20177
20189
201910
20208
202111
20229
202310
202417
20259
20262
Browse patents by year
YearPatents
20158
201610
20177
20189
201910
20208
202111
20229
202310
202417
20259
20262

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
H10W90/0039
H10W72/88431
H02M1/0827
H02M7/00323
H10D62/10623

Technology areas

Mapped technology topics for this assignee.

Company technology slices
TechnologyPatents
Electricity110
Cross-Sectional Technologies16
Operations & Transport5
Human Necessities3
Physics2
Chemistry & Metallurgy1

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Frequently asked questions

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

How many patents does Hitachi Power Semiconductor Device Ltd have in patentsdb?
Hitachi Power Semiconductor Device Ltd is linked to 110 publications as assignee in our database.
What technology areas does Hitachi Power Semiconductor Device Ltd patent most?
Top mapped technology areas by patent count: Electricity (110); Cross-Sectional Technologies (16); Operations & Transport (5).
Is Hitachi Power Semiconductor Device Ltd's patent activity growing?
In our data, assignee counts were 17 in 2024 and 9 in 2025 (lower year over year).
What are recent patents assigned to Hitachi Power Semiconductor Device Ltd?
See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.