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DS

David E. Seffens — 3 Patents

Monroe, LA: #36 of 148 inventorsTop 25%
Louisiana: #2,243 of 10,876 inventorsTop 25%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
David E. Seffens has been granted 3 US patents. The first was granted in 1981 and the most recent in November 2004. David E. Seffens ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David E. Seffens in Monroe, LA, US.

Patents per Year

Patents granted per year, 1981 to 2004Bar chart with a peak of 1 patents in 1981.peak 11981: 1 patents19811989: 1 patents19892004: 1 patents2004

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6811022 Log transport system Michael C. Ballard, David R. Shald, David C. Seffens, Jeffery T. Ramsey 2004-11-02
4823851 Infeed table for lumber planer machine — 1989-04-25
4298043 Log transport system — 1981-11-03

Frequent Collaborators

David C. Seffens1 shared
Jeffery T. Ramsey1 shared
David R. Shald1 shared
Michael C. Ballard1 shared

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