How many patents does Porterfield John have in patentsdb?

Porterfield John is linked to 24 publications as assignee in our database.

What technology areas does Porterfield John patent most?

Top mapped technology areas by patent count: Human Necessities (24); Physics (9).

In our data, assignee counts were 6 in 2024 and 2 in 2025 (lower year over year).

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

Porterfield John holds 24 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 declining.

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
Human Necessities	24
Physics	9

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

How many patents does Porterfield John have in patentsdb?: Porterfield John is linked to 24 publications as assignee in our database.
What technology areas does Porterfield John patent most?: Top mapped technology areas by patent count: Human Necessities (24); Physics (9).
Is Porterfield John's patent activity growing?: In our data, assignee counts were 6 in 2024 and 2 in 2025 (lower year over year).
What are recent patents assigned to Porterfield John?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.