How many patents does Mitsui Mining & Smelting Co Ltd have in patentsdb?

Mitsui Mining & Smelting Co Ltd is linked to 311 publications as assignee in our database.

What technology areas does Mitsui Mining & Smelting Co Ltd patent most?

Top mapped technology areas by patent count: Electricity (211); Chemistry & Metallurgy (182); Operations & Transport (161).

In our data, assignee counts were 90 in 2024 and 69 in 2025 (lower year over year).

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

Mitsui Mining & Smelting Co Ltd holds 311 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 rapidly growing.

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
Electricity	211
Chemistry & Metallurgy	182
Operations & Transport	161
Cross-Sectional Technologies	133
Mechanical Engineering	48
Physics	26
Human Necessities	1
Textiles & Paper	1

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

How many patents does Mitsui Mining & Smelting Co Ltd have in patentsdb?: Mitsui Mining & Smelting Co Ltd is linked to 311 publications as assignee in our database.
What technology areas does Mitsui Mining & Smelting Co Ltd patent most?: Top mapped technology areas by patent count: Electricity (211); Chemistry & Metallurgy (182); Operations & Transport (161).
Is Mitsui Mining & Smelting Co Ltd's patent activity growing?: In our data, assignee counts were 90 in 2024 and 69 in 2025 (lower year over year).
What are recent patents assigned to Mitsui Mining & Smelting Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.