How many patents does Idemitsu Kosan Co have in patentsdb?

Idemitsu Kosan Co is linked to 2,354 publications as assignee in our database.

What technology areas does Idemitsu Kosan Co patent most?

Top mapped technology areas by patent count: Chemistry & Metallurgy (2,150); Electricity (1,357); Cross-Sectional Technologies (341).

In our data, assignee counts were 230 in 2024 and 199 in 2025 (lower year over year).

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

Idemitsu Kosan Co holds 2,354 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 stable.

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
Chemistry & Metallurgy	2,150
Electricity	1,357
Cross-Sectional Technologies	341
Operations & Transport	160
Physics	121
Mechanical Engineering	94
Human Necessities	37
Textiles & Paper	22
Fixed Constructions	1

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

How many patents does Idemitsu Kosan Co have in patentsdb?: Idemitsu Kosan Co is linked to 2,354 publications as assignee in our database.
What technology areas does Idemitsu Kosan Co patent most?: Top mapped technology areas by patent count: Chemistry & Metallurgy (2,150); Electricity (1,357); Cross-Sectional Technologies (341).
Is Idemitsu Kosan Co's patent activity growing?: In our data, assignee counts were 230 in 2024 and 199 in 2025 (lower year over year).
What are recent patents assigned to Idemitsu Kosan Co?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.