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John D. Chang — 1 Patent

3M: 1 patents #7,251 of 11,543Top 65%

Afton, MN: #71 of 97 inventorsTop 75%

Minnesota: #32,682 of 52,454 inventorsTop 65%

Overall (All Time): #2,406,284 of 4,157,543Top 60%

1 Patents All Time

John D. Chang has been granted 1 US patent while listed as an inventor at 3M. All of these patents were granted in 1994. John D. Chang ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list John D. Chang in Afton, MN, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5344177	Ski base and running surface	Forrest J. Rouser, Mark E. Reeves	1994-09-06	$7,964,000

John D. Chang — 1 Patent

Issued Patents All Time

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