How many patents does Nanjing Roi Optoelectronics Tech Co Ltd have in patentsdb?

Nanjing Roi Optoelectronics Tech Co Ltd is linked to 5 publications as assignee in our database.

What technology areas does Nanjing Roi Optoelectronics Tech Co Ltd patent most?

Top mapped technology areas by patent count: Physics (5); Electricity (3).

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

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

Nanjing Roi Optoelectronics Tech Co Ltd holds 5 patents in our database, with recent filings and technology areas summarized below.

Year-over-year patent counts for this assignee.

Filing activity appears stable based on the most recent years.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Physics	5
Electricity	3

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

How many patents does Nanjing Roi Optoelectronics Tech Co Ltd have in patentsdb?: Nanjing Roi Optoelectronics Tech Co Ltd is linked to 5 publications as assignee in our database.
What technology areas does Nanjing Roi Optoelectronics Tech Co Ltd patent most?: Top mapped technology areas by patent count: Physics (5); Electricity (3).
Is Nanjing Roi Optoelectronics Tech Co Ltd's patent activity growing?: In our data, assignee counts were 1 in 2024 and 1 in 2025 (similar year over year).
What are recent patents assigned to Nanjing Roi Optoelectronics Tech Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.