Inventor · disambiguated record

Earl R. Freeman

Also filed as: FREEMAN EARL R

2 granted patents·179 citations·filing 1984–1984

70Inventor score

Technology areasC09K E21B

Files withHUGHES TOOL CO2

Top patents by PatentIndex Score

2 records

0191US4569394AMethod and apparatus for increasing the concentration of proppant in well stimulation techniquesHUGHES TOOL CO·Filed 1984·Granted Feb 11, 1986·118 cites·13 claims
0288US4512405APneumatic transfer of solids into wellsHUGHES TOOL CO·Filed 1984·Granted Apr 23, 1985·61 cites·17 claims

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Earl R. Freeman — Patent Inventor | PatentIndex