How many patents does Hitachi Ltd have in patentsdb?

Hitachi Ltd is linked to 11,561 publications as assignee in our database.

What technology areas does Hitachi Ltd patent most?

Top mapped technology areas by patent count: Physics (8,782); Electricity (3,926); Cross-Sectional Technologies (1,370).

In our data, assignee counts were 815 in 2024 and 668 in 2025 (lower year over year).

See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.

Hitachi Ltd holds 11,561 patents in our database, with recent filings and technology areas summarized below.

Year-over-year patent counts for this assignee.

Filing activity over the last five years is declining.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Most common classification codes in this portfolio.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Physics	8,782
Electricity	3,926
Cross-Sectional Technologies	1,370
Operations & Transport	1,310
Human Necessities	1,103
Chemistry & Metallurgy	503
Mechanical Engineering	341
Fixed Constructions	71
Textiles & Paper	2

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

How many patents does Hitachi Ltd have in patentsdb?: Hitachi Ltd is linked to 11,561 publications as assignee in our database.
What technology areas does Hitachi Ltd patent most?: Top mapped technology areas by patent count: Physics (8,782); Electricity (3,926); Cross-Sectional Technologies (1,370).
Is Hitachi Ltd's patent activity growing?: In our data, assignee counts were 815 in 2024 and 668 in 2025 (lower year over year).
What are recent patents assigned to Hitachi Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.