How many patents does Yamashita Hiroyuki have in patentsdb?

Yamashita Hiroyuki is linked to 19 publications as assignee in our database.

What technology areas does Yamashita Hiroyuki patent most?

Top mapped technology areas by patent count: Operations & Transport (13); Chemistry & Metallurgy (5); Textiles & Paper (5).

In our data, assignee counts were 3 in 2024 and 1 in 2025 (lower year over year).

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

Yamashita Hiroyuki holds 19 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 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
Operations & Transport	13
Chemistry & Metallurgy	5
Textiles & Paper	5
Mechanical Engineering	2
Cross-Sectional Technologies	2
Electricity	2
Physics	1

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

How many patents does Yamashita Hiroyuki have in patentsdb?: Yamashita Hiroyuki is linked to 19 publications as assignee in our database.
What technology areas does Yamashita Hiroyuki patent most?: Top mapped technology areas by patent count: Operations & Transport (13); Chemistry & Metallurgy (5); Textiles & Paper (5).
Is Yamashita Hiroyuki's patent activity growing?: In our data, assignee counts were 3 in 2024 and 1 in 2025 (lower year over year).
What are recent patents assigned to Yamashita Hiroyuki?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.