How many patents does Okuma Machinery Works Ltd have in patentsdb?

Okuma Machinery Works Ltd is linked to 427 publications as assignee in our database.

What technology areas does Okuma Machinery Works Ltd patent most?

Top mapped technology areas by patent count: Physics (276); Operations & Transport (253); Cross-Sectional Technologies (86).

In our data, assignee counts were 33 in 2024 and 29 in 2025 (lower year over year).

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

Okuma Machinery Works Ltd holds 427 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	276
Operations & Transport	253
Cross-Sectional Technologies	86
Electricity	62
Mechanical Engineering	26
Fixed Constructions	4
Chemistry & Metallurgy	2

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

How many patents does Okuma Machinery Works Ltd have in patentsdb?: Okuma Machinery Works Ltd is linked to 427 publications as assignee in our database.
What technology areas does Okuma Machinery Works Ltd patent most?: Top mapped technology areas by patent count: Physics (276); Operations & Transport (253); Cross-Sectional Technologies (86).
Is Okuma Machinery Works Ltd's patent activity growing?: In our data, assignee counts were 33 in 2024 and 29 in 2025 (lower year over year).
What are recent patents assigned to Okuma Machinery Works Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.