Inventor · disambiguated record
Richard D. Primdahl
Also filed as: PRIMDAHL RICHARD D
6 granted patents·480 citations·filing 1982–1997
88Inventor score
Top patents by PatentIndex Score
6 records- 0193US4921463ACoin sorter with counter and brake mechanismCUMMINS ALLISON CORP·Filed 1987·Granted May 1, 1990·150 cites·3 claims
- 0290US5888381AWater filter with pressure actuated flow monitorUNITED STATES FILTER CORP·Filed 1997·Granted Mar 30, 1999·102 cites·21 claims
- 0387US5833849ASpout mounted water filter and extensionEVERPURE·Filed 1997·Granted Nov 10, 1998·82 cites·15 claims
- 0484US5055086ACoin sorter with counter and brake mechanismCUMMINS ALLISON CORP·Filed 1990·Granted Oct 8, 1991·75 cites·22 claims
- 0573USRE34934ECoin sorter with counter and brake mechanismFiled 1993·Granted May 9, 1995·53 cites·23 claims
- 0657US4526204AControl apparatus for hydraulic valveDRESSER IND·Filed 1982·Granted Jul 2, 1985·18 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →