Inventor · disambiguated record
John F. Campbell
Also filed as: CAMPBELL JOHN · CAMPBELL JOHN F
5 granted patents·227 citations·filing 1978–2000
84Inventor score
Top patents by PatentIndex Score
5 records- 0188USD260280SCheck valve casingGSW LIMITED/LIMITEE·Filed 1978·Granted Aug 18, 1981·30 cites·1 claims
- 0284US6524278B1Needle sheathNMT GROUP PLC·Filed 2000·Granted Feb 25, 2003·125 cites·38 claims
- 0360US4721156AWell clean out apparatusCAMPBELL JOHN F·Filed 1987·Granted Jan 26, 1988·34 cites·9 claims
- 0449US5503389ATraining deviceFiled 1993·Granted Apr 2, 1996·24 cites·16 claims
- 0537US4621811ABasketball training deviceCAMPBELL JOHN F·Filed 1986·Granted Nov 11, 1986·14 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →