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William J. Kerwin — 3 Patents

DUDurel: 1 patents #23 of 35Top 70%
UEUS Dept of Energy: 1 patents #1,355 of 5,099Top 30%
Tucson, AZ: #1,869 of 6,004 inventorsTop 35%
Arizona: #10,157 of 32,909 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
William J. Kerwin has been granted 3 US patents while listed as an inventor at Durel. The first was granted in 1980 and the most recent in January 2002. William J. Kerwin ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list William J. Kerwin in Tucson, AZ, US.

Patents per Year

Patents granted per year, 1980 to 2002Bar chart with a peak of 1 patents in 1980.peak 11980: 1 patents19801984: 1 patents19842002: 1 patents2002

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6343027 Transformerless high voltage inverter using a fourth-order impedance network — 2002-01-29
4424491 Automatic voltage imbalance detector Ronald E. Bobbett, J. Byron McCormick 1984-01-03
4232698 Pressure relief valve with pressure indicating means Craig Hosterman 1980-11-11

Frequent Collaborators

Ronald E. Bobbett1 shared
J. Byron McCormick1 shared
Craig Hosterman1 shared

Nearby-Ranked Inventors

Daniel Silion3
Hangfeng Li3
Mark Vander Wal3
Chad M. Goltzman3
Sathish Kumar Thanganathan3
Debbie Maloyd3
Ethan Alexander Garrett3
Paul Sabatka3
Sergii Bomko3