How many patents does Nhk Spring Co Ltd have in patentsdb?

Nhk Spring Co Ltd is linked to 1,152 publications as assignee in our database.

What technology areas does Nhk Spring Co Ltd patent most?

Top mapped technology areas by patent count: Operations & Transport (699); Mechanical Engineering (340); Physics (323).

In our data, assignee counts were 125 in 2024 and 144 in 2025 (higher year over year).

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

Nhk Spring Co Ltd holds 1,152 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
Operations & Transport	699
Mechanical Engineering	340
Physics	323
Electricity	228
Chemistry & Metallurgy	198
Cross-Sectional Technologies	128
Human Necessities	64
Fixed Constructions	7
Textiles & Paper	3

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

How many patents does Nhk Spring Co Ltd have in patentsdb?: Nhk Spring Co Ltd is linked to 1,152 publications as assignee in our database.
What technology areas does Nhk Spring Co Ltd patent most?: Top mapped technology areas by patent count: Operations & Transport (699); Mechanical Engineering (340); Physics (323).
Is Nhk Spring Co Ltd's patent activity growing?: In our data, assignee counts were 125 in 2024 and 144 in 2025 (higher year over year).
What are recent patents assigned to Nhk Spring Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.