John E. Dunstan — 1 Patent at 3M

John E. Dunstan has been granted 1 US patent while listed as an inventor at 3M. All of these patents were granted in 1990. John E. Dunstan ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list John E. Dunstan in Windom, MN, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4897750	Encodable insert for a recording cassette	Robert L. Hanson	1990-01-30	$6,215,000

John E. Dunstan — 1 Patent

Issued Patents All Time

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