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USPTO Patent Rankings Data through Dec 31, 2025
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John Claude Springstead — 2 Patents

RARayovac: 2 patents #49 of 170Top 30%
Mazomanie, WI: #12 of 25 inventorsTop 50%
Wisconsin: #17,225 of 40,088 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
John Claude Springstead has been granted 2 US patents while listed as an inventor at Rayovac. The first was granted in 1999 and the most recent in April 2002. John Claude Springstead ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list John Claude Springstead in Mazomanie, WI, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6372381 Duplex-coated cathode cans, and electrochemical cells made therewith SangKeun Park, David Matthew Armour 2002-04-16 $5,978,000
5919586 Toed-in anode can and electrochemical cell made therewith John Edward Oltman 1999-07-06 $7,531,000