Assignee
PREUSSAG AG
DE·29 granted patents·553 citations·filing 1974–1992
Top patents by PatentIndex Score
29 records- 0183US4153357AUnderwater cameraPREUSSAG AG·Filed 1977·Granted May 8, 1979·19 cites·10 claims
- 0282US4947944ADevice for steering a drilling tool and/or drill stringPREUSSAG AG·Filed 1988·Granted Aug 14, 1990·103 cites·18 claims
- 0379US4184758ADeep sea underwater cameraPREUSSAG AG·Filed 1977·Granted Jan 22, 1980·11 cites·4 claims
- 0477US4442908ATool for drilling curved sections of well holesPREUSSAG AG·Filed 1981·Granted Apr 17, 1984·74 cites·13 claims
- 0577US3939391AApparatus for charging a hermetically sealed electrical energy sourcePREUSSAG AG·Filed 1974·Granted Feb 17, 1976·21 cites·5 claims
- 0676US5182731AWell bore data transmission apparatusPREUSSAG AG·Filed 1992·Granted Jan 26, 1993·94 cites·11 claims
- 0773US4745276ADevice for the detection of fluorescent substances on the surface of the earthPREUSSAG AG·Filed 1986·Granted May 17, 1988·44 cites·7 claims
- 0869US4035816AHousing assembly for an underwater camera with a flash devicePREUSSAG AG·Filed 1976·Granted Jul 12, 1977·7 cites·10 claims
- 0956US4386473ARecovery of sediments from the bottom of the seaPREUSSAG AG·Filed 1980·Granted Jun 7, 1983·14 cites·16 claims
- 1048US3960511AZone melting processPREUSSAG AG·Filed 1974·Granted Jun 1, 1976·7 cites·3 claims
- 1147US4666347AHydraulic conveying of solidsPREUSSAG AG·Filed 1985·Granted May 19, 1987·12 cites·7 claims
- 1243US5246070APiping for the completion of a groundwater monitoring sitePREUSSAG AG·Filed 1991·Granted Sep 21, 1993·26 cites·7 claims
- 1341US4666686AProcess for the fluid-fluid extraction of gallium, germanium or indium from liquid solutionsPREUSSAG AG·Filed 1986·Granted May 19, 1987·14 cites·20 claims
- 1441US4468154AMethod of disposal or temporary storage of waste materialPREUSSAG AG·Filed 1981·Granted Aug 28, 1984·11 cites·10 claims
- 1538US4293265AHydraulically operated hoisting apparatus for a ship for picking floating objects up out of the seaPREUSSAG AG·Filed 1978·Granted Oct 6, 1981·7 cites·6 claims
- 1636US4652055ADevice for collecting manganese nodules on the ocean floorPREUSSAG AG·Filed 1985·Granted Mar 24, 1987·10 cites·23 claims
- 1734US4398361ARecovery of sediments from the bottom of the sea by suspended suction pipePREUSSAG AG·Filed 1980·Granted Aug 16, 1983·6 cites·12 claims
- 1834US4316386AFluid pressure measuring apparatus for incorporation into a pipeline rising from a wellPREUSSAG AG·Filed 1980·Granted Feb 23, 1982·15 cites·10 claims
- 1933US3935058AZone melting processPREUSSAG AG·Filed 1974·Granted Jan 27, 1976·6 cites·12 claims
- 2032US5154538AMethod and apparatus for removing a liquid phase floating on a surface of groundwaterPREUSSAG AG·Filed 1990·Granted Oct 13, 1992·11 cites·9 claims
- 2132US4077799AMethod and apparatus of refining crude cadmiumPREUSSAG AG·Filed 1976·Granted Mar 7, 1978·4 cites·1 claims
- 2232US3996678AFree-fall grabPREUSSAG AG·Filed 1975·Granted Dec 14, 1976·6 cites·10 claims
- 2331US4688831AThreaded or push-type couplingPREUSSAG AG·Filed 1985·Granted Aug 25, 1987·16 cites·3 claims
- 2428US4737351AProcess for the recovery of tinPREUSSAG AG·Filed 1986·Granted Apr 12, 1988·4 cites·10 claims
- 2527US4158963AProcess for determining the location and/or extent of rock cavitiesPREUSSAG AG·Filed 1978·Granted Jun 26, 1979·1 cites·10 claims
- 2626US4010937AMethod and apparatus of refining crude cadmiumPREUSSAG AG·Filed 1975·Granted Mar 8, 1977·3 cites·11 claims
- 2725US4580049AProbe for locating mineral depositsPREUSSAG AG·Filed 1984·Granted Apr 1, 1986·3 cites·6 claims
- 2823US4115220AProcess for the preparation of high purity antimonyPREUSSAG AG·Filed 1977·Granted Sep 19, 1978·2 cites·6 claims
- 2915US4160623ADeep well pumpPREUSSAG AG·Filed 1976·Granted Jul 10, 1979·2 cites·13 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →