Inventor · disambiguated record
John Edward Chapman
Also filed as: CHAPMAN JOHN · CHAPMAN JOHN EDWARD
3 granted patents·75 citations·filing 1974–1992
71Inventor score
Top patents by PatentIndex Score
3 records- 0188US4050384ATube inspection and servicing apparatusBABCOCK & WILCOX LTD·Filed 1975·Granted Sep 27, 1977·59 cites·4 claims
- 0247US5300738AApparatus for registering and indicating hall calls at an elevator entryway with a ticket dispenserINVENTIO AG·Filed 1992·Granted Apr 5, 1994·13 cites·12 claims
- 0332US3956810ATool holding and positioning deviceBABCOCK & WILCOX LTD·Filed 1974·Granted May 18, 1976·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →