Inventor · disambiguated record
Roy J. Mefferd
Also filed as: MEFFERD ROY J
7 granted patents·167 citations·filing 1976–1992
86Inventor score
Top patents by PatentIndex Score
7 records- 0182US4387845AMethod and apparatus for holding and cooling a metal tube during weldingMEFFERD ROY J·Filed 1980·Granted Jun 14, 1983·37 cites·7 claims
- 0280US4384511AHydraulic cylinderMEFFERD ROY J·Filed 1980·Granted May 24, 1983·28 cites·2 claims
- 0371US4821818ATube auger sectionsMICRO SPECIALTIES CO INC·Filed 1988·Granted Apr 18, 1989·51 cites·13 claims
- 0468US5372208ATube section having slots for samplingGOLD STAR MFG INC·Filed 1992·Granted Dec 13, 1994·30 cites·29 claims
- 0561US4060259AImplement transporting deviceMEFFERD ROY J·Filed 1976·Granted Nov 29, 1977·19 cites·8 claims
- 0631USD264299SHand tool for loosening or tightening nuts in place of a spanner wrenchMEFFERD ROY J·Filed 1980·Granted May 11, 1982·1 cites·1 claims
- 0727US4299144AHand tool and method for using sameMEFFERD ROY J·Filed 1980·Granted Nov 10, 1981·1 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →