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Home › Inventors › David E. Simpkins

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David E. Simpkins — 1 Patent

Benfleet, GB: #13 of 26 inventorsTop 50%

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

1 Patents All Time

David E. Simpkins has been granted 1 US patent. All of these patents were granted in 1981. David E. Simpkins ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list David E. Simpkins in Benfleet, GB.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4272526	Derivatives of chloral	John B. Taylor	1981-06-09

David E. Simpkins — 1 Patent

Issued Patents All Time

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