Inventor · disambiguated record
Earl R. Johnson
Also filed as: JOHNSON EARL R
6 granted patents·71 citations·filing 1977–1984
83Inventor score
Files withLOFFLAND BROTHERS6
Top patents by PatentIndex Score
6 records- 0172US4226311ARotary drive disc brake for drawworksLOFFLAND BROTHERS·Filed 1978·Granted Oct 7, 1980·20 cites·5 claims
- 0261US4335808AMultiple biscuit clutch or brakeLOFFLAND BROTHERS·Filed 1980·Granted Jun 22, 1982·14 cites·9 claims
- 0358US4168768ABraking system for cable spooling drumsLOFFLAND BROTHERS·Filed 1977·Granted Sep 25, 1979·13 cites·5 claims
- 0456US4566579AMultiple biscuit clutch or brake with circulated immersion coolingLOFFLAND BROTHERS·Filed 1984·Granted Jan 28, 1986·12 cites·8 claims
- 0548US4144953ARotary drive disc brake for drawworksLOFFLAND BROTHERS·Filed 1977·Granted Mar 20, 1979·9 cites·4 claims
- 0630US4203575AHydraulic elevating rampLOFFLAND BROTHERS·Filed 1979·Granted May 20, 1980·3 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →