Inventor · disambiguated record
Harold R. Diffenderfer
Also filed as: DIFFENDERFER HAROLD R
5 granted patents·141 citations·filing 1977–1986
83Inventor score
Files withNEAPCO INC5
Top patents by PatentIndex Score
5 records- 0186US4669737AAnnular shaft seal with cam portion on sealing lipNEAPCO INC·Filed 1986·Granted Jun 2, 1987·38 cites·13 claims
- 0277US4622022ATelescoping tubes for torque transmissionNEAPCO INC·Filed 1985·Granted Nov 11, 1986·39 cites·4 claims
- 0371US4622840AMethod for drawing telescoping tubes for torque transmissionNEAPCO INC·Filed 1985·Granted Nov 18, 1986·31 cites·12 claims
- 0470US4568313AProtective guard for articulated shaftingNEAPCO INC·Filed 1983·Granted Feb 4, 1986·22 cites·4 claims
- 0554US4154065AUniversal joint pivot assemblyNEAPCO INC·Filed 1977·Granted May 15, 1979·11 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →