How many patents does Kumagai Naohiro have in patentsdb?

Kumagai Naohiro is linked to 82 publications as assignee in our database.

What technology areas does Kumagai Naohiro patent most?

Top mapped technology areas by patent count: Physics (82); Operations & Transport (6); Mechanical Engineering (5).

In our data, assignee counts were 1 in 2023 and 3 in 2025 (higher year over year).

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

Kumagai Naohiro holds 82 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 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
Physics	82
Operations & Transport	6
Mechanical Engineering	5
Electricity	1
Cross-Sectional Technologies	1

Free tools are coming soon. Tell us what you want to track and we'll notify you.

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

How many patents does Kumagai Naohiro have in patentsdb?: Kumagai Naohiro is linked to 82 publications as assignee in our database.
What technology areas does Kumagai Naohiro patent most?: Top mapped technology areas by patent count: Physics (82); Operations & Transport (6); Mechanical Engineering (5).
Is Kumagai Naohiro's patent activity growing?: In our data, assignee counts were 1 in 2023 and 3 in 2025 (higher year over year).
What are recent patents assigned to Kumagai Naohiro?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.