Inventor · disambiguated record
Karl D. Dreher
Also filed as: DREHER KARL · DREHER KARL D · ZAHN WOLFGANG
11 granted patents·266 citations·filing 1973–1993
91Inventor score
Top patents by PatentIndex Score
11 records- 0197US3954627ALamellar micelle containing compositions which exhibit retro-viscous propertiesMARATHON OIL CO·Filed 1973·Granted May 4, 1976·89 cites·13 claims
- 0290US4218032AApparatus for convoluting webs onto rotary coresAGFA GEVAERT AG·Filed 1979·Granted Aug 19, 1980·25 cites·30 claims
- 0385US5358046AOil recovery process utilizing a supercritical carbon dioxide emulsionMARATHON OIL CO·Filed 1993·Granted Oct 25, 1994·51 cites·35 claims
- 0480US3948782ADrilling with low viscosity fluidsMARATHON OIL CO·Filed 1973·Granted Apr 6, 1976·20 cites·13 claims
- 0572US3950034AHigh fluidity liquid for pipelining solidsMARATHON OIL CO·Filed 1973·Granted Apr 13, 1976·14 cites·22 claims
- 0670US4022276AMethod of selecting oil recovery fluids using nuclear magnetic resonance measurementsMARATHON OIL CO·Filed 1976·Granted May 10, 1977·30 cites·8 claims
- 0758US3938591AIntermediate fluid systems for long distance oil displacementMARATHON OIL CO·Filed 1975·Granted Feb 17, 1976·17 cites·9 claims
- 0856US4010912AApparatus for collecting webs of photographic paper or the likeAGFA GEVAERT AG·Filed 1975·Granted Mar 8, 1977·11 cites·18 claims
- 0946US4221229ARetro-viscous fluidic fluidMARATHON OIL CO·Filed 1976·Granted Sep 9, 1980·6 cites·14 claims
- 1040US4035076APhotographic copying machineAGFA GEVAERT AG·Filed 1975·Granted Jul 12, 1977·2 cites·2 claims
- 1135US3946922APhotographic copying machineAGFA GEVAERT AG·Filed 1973·Granted Mar 30, 1976·1 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →