Inventor · disambiguated record
David P. Hillstead
Also filed as: BEHLE GUNTER R · HILLSTEAD DAVID P
4 granted patents·78 citations·filing 1978–1982
75Inventor score
Files withACF IND INC4
Top patents by PatentIndex Score
4 records- 0188US4265182ADamping railway car truckACF IND INC·Filed 1979·Granted May 5, 1981·60 cites·6 claims
- 0245US4440379ABottom operator for top operated bottom installed tank car valve assemblyACF IND INC·Filed 1982·Granted Apr 3, 1984·9 cites·14 claims
- 0341US4198032ABottom operable tank car lading valve assembly which does not require a skidACF IND INC·Filed 1978·Granted Apr 15, 1980·8 cites·10 claims
- 0428US4270729ATop operated tank car clapper valueACF IND INC·Filed 1978·Granted Jun 2, 1981·1 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →