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Stephen G. Corthell — 4 Patents

NMNational Machine: 4 patents #11 of 50Top 25%
Tiffin, OH: #19 of 128 inventorsTop 15%
Ohio: #19,019 of 73,341 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Stephen G. Corthell has been granted 4 US patents while listed as an inventor at National Machine. The first was granted in 1990 and the most recent in November 1994. Stephen G. Corthell ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Stephen G. Corthell in Tiffin, OH, US.

Patents per Year

Patents granted per year, 1990 to 1994Bar chart with a peak of 1 patents in 1990.peak 11990: 1 patents19901992: 1 patents19921993: 1 patents19931994: 1 patents1994

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5363686 Progressive former William H. Hite, Dennis H. Roush 1994-11-15
5263356 Progressive former and method of producing same William H. Hite, Dennis N. Roush 1993-11-23
5138866 Progressive former and method of producing same William H. Hite, Dennis N. Roush 1992-08-18
4910993 Progressive former and method of producing same William H. Hite, Dennis N. Roush 1990-03-27

Frequent Collaborators

William H. Hite4 shared
Dennis N. Roush3 shared
Dennis H. Roush1 shared

Nearby-Ranked Inventors

Jagadeesh Kandasamy4
Ross CABOT4
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Vinayakaraddy Gulabal4
Sandra Bittorf4
Aviel FOGEL4
Eric Matthew Walton4