Inventor · disambiguated record
David Whitehead
Also filed as: WHITEHEAD DAVID · WHITEHEAD DAVID A
5 granted patents·4 pending applications·43 citations·filing 1983–2021
73Inventor score
Files withCOLORMATRIX HOLDINGS INC5AIRTURA LTD1MASSEY FERGUSON PERKINS LTD1PERKINS ENGINE GROUP LIMITED1ROLLS ROYCE PLC1
Top patents by PatentIndex Score
9 records- 0170US4479463AEngine sumpPERKINS ENGINE GROUP LIMITED·Filed 1983·Granted Oct 30, 1984·33 cites·9 claims
- 0255US12311586B2Apparatus and method for dosing a fluid formulation into a polymeric materialCOLORMATRIX HOLDINGS INC·Filed 2021·Granted May 27, 2025·0 cites·19 claims
- 0353US2023190984A1Air purifying deviceAIRTURA LTD·Filed 2021·Application pending·0 cites
- 0452US11618972B2Method of and apparatus for injecting a liquid formulation into a molten polymerCOLORMATRIX HOLDINGS INC·Filed 2018·Granted Apr 4, 2023·0 cites·18 claims
- 0551US11065798B2Apparatus and method for injecting a fluid formulation into a melted polymeric materialCOLORMATRIX HOLDINGS INC·Filed 2016·Granted Jul 20, 2021·0 cites·20 claims
- 0646US2021053253A1Assembly and method for injecting a fluid into molten polymeric materialsCOLORMATRIX HOLDINGS INC·Filed 2019·Application pending·0 cites
- 0743US4502452AValveMASSEY FERGUSON PERKINS LTD·Filed 1983·Granted Mar 5, 1985·10 cites·7 claims
- 0841US2014230558A1Process and apparatus for cleaning a surfaceROLLS ROYCE PLC·Filed 2014·Application pending·0 cites
- 0940US2019203705A1Polymeric materialsCOLORMATRIX HOLDINGS INC·Filed 2017·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when David Whitehead files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →