Inventor · disambiguated record
Robert D. Heyl
Also filed as: HEYL ROBERT D
9 granted patents·253 citations·filing 1976–1993
90Inventor score
Top patents by PatentIndex Score
9 records- 0192US5494381AApparatus and method for pneumatically conveying bulk materialsYOUNG IND INC·Filed 1993·Granted Feb 27, 1996·83 cites·20 claims
- 0292US4059205ARotary valveYOUNG IND INC·Filed 1976·Granted Nov 22, 1977·47 cites·23 claims
- 0379US5368311AShaft seal assembly for a rotary valveFiled 1992·Granted Nov 29, 1994·37 cites·6 claims
- 0474US4889452AVented product pump and air filter arrangementYOUNG IND INC·Filed 1989·Granted Dec 26, 1989·27 cites·8 claims
- 0561US4600032ARotary shaft seal assemblyYOUNG IND INC·Filed 1985·Granted Jul 15, 1986·19 cites·16 claims
- 0657US4770611AProduct pump assemblyYOUNG IND INC·Filed 1988·Granted Sep 13, 1988·15 cites·22 claims
- 0750US4830043AImprovement in rotary valvesDELAWARE INVESTMENTS INC·Filed 1988·Granted May 16, 1989·13 cites·12 claims
- 0838US5417330AApparatus for separating tramp material from a pneumatic conveying systgemYOUNG IND INC·Filed 1992·Granted May 23, 1995·7 cites·15 claims
- 0931US5078435ASelf-aligned flanged couplingYOUNG IND INC·Filed 1991·Granted Jan 7, 1992·5 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →