Inventor · disambiguated record
Ralph Coupland
Also filed as: COUPLAND RALPH
6 granted patents·57 citations·filing 1974–1990
82Inventor score
Top patents by PatentIndex Score
6 records- 0156US4143924ALoad-sensing valvesDEWANDRE CO LTD C·Filed 1977·Granted Mar 13, 1979·8 cites·7 claims
- 0253US3943831ASpring brake units and drainage means thereforDEWANDRE CO LTD C·Filed 1974·Granted Mar 16, 1976·12 cites·6 claims
- 0348US5113652ADiesel engine exhaust systemWABCO AUTOMOTIVE UK·Filed 1990·Granted May 19, 1992·22 cites·8 claims
- 0441US4057128ASlack adjusters for vehicle brakesDEWANDRE CO LTD C·Filed 1976·Granted Nov 8, 1977·7 cites·7 claims
- 0538US4010983ADual brake circuit valve assemblyDEWANDRE CO LTD C·Filed 1975·Granted Mar 8, 1977·6 cites·2 claims
- 0622US4821518AClutch booster with overcenter meansDEWANDRE CO LTD C·Filed 1987·Granted Apr 18, 1989·2 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →