How many patents does Canon Electron Tubes & Devices Co Ltd have in patentsdb?

Canon Electron Tubes & Devices Co Ltd is linked to 74 publications as assignee in our database.

What technology areas does Canon Electron Tubes & Devices Co Ltd patent most?

Top mapped technology areas by patent count: Electricity (64); Physics (28); Human Necessities (9).

In our data, assignee counts were 11 in 2024 and 11 in 2025 (similar year over year).

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

Canon Electron Tubes & Devices Co Ltd holds 74 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.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Electricity	64
Physics	28
Human Necessities	9
Mechanical Engineering	8
Chemistry & Metallurgy	3
Cross-Sectional Technologies	3
Operations & Transport	2

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

How many patents does Canon Electron Tubes & Devices Co Ltd have in patentsdb?: Canon Electron Tubes & Devices Co Ltd is linked to 74 publications as assignee in our database.
What technology areas does Canon Electron Tubes & Devices Co Ltd patent most?: Top mapped technology areas by patent count: Electricity (64); Physics (28); Human Necessities (9).
Is Canon Electron Tubes & Devices Co Ltd's patent activity growing?: In our data, assignee counts were 11 in 2024 and 11 in 2025 (similar year over year).
What are recent patents assigned to Canon Electron Tubes & Devices Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.