Assignee
ETAK INC
US·22 granted patents·3,087 citations·filing 1984–1998
Top patents by PatentIndex Score
22 records- 0198US4914605AApparatus and method for displaying a mapETAK INC·Filed 1989·Granted Apr 3, 1990·380 cites·37 claims
- 0298US4796191AVehicle navigational system and methodETAK INC·Filed 1984·Granted Jan 3, 1989·271 cites·78 claims
- 0396US5311195ACombined relative and absolute positioning method and apparatusETAK INC·Filed 1991·Granted May 10, 1994·341 cites·57 claims
- 0496US4734863AApparatus for generating a heading signal for a land vehicleETAK INC·Filed 1985·Granted Mar 29, 1988·180 cites·29 claims
- 0594US5948043ANavigation system using GPS dataETAK INC·Filed 1996·Granted Sep 7, 1999·302 cites·68 claims
- 0693US4613913AData encoding and decoding schemeETAK INC·Filed 1984·Granted Sep 23, 1986·44 cites·12 claims
- 0792US5729458ACost zonesETAK INC·Filed 1995·Granted Mar 17, 1998·131 cites·29 claims
- 0891US6021406AMethod for storing map data in a database using space filling curves and a method of searching the database to find objects in a given area and to find objects nearest to a locationETAK INC·Filed 1997·Granted Feb 1, 2000·180 cites·14 claims
- 0991US5893081AUsing multiple levels of costs for a pathfinding computationETAK INC·Filed 1996·Granted Apr 6, 1999·151 cites·50 claims
- 1090US6038509ASystem for recalculating a pathETAK INC·Filed 1998·Granted Mar 14, 2000·171 cites·52 claims
- 1189US5706503AMethod of clustering multi-dimensional related data in a computer database by combining the two verticles of a graph connected by an edge having the highest scoreETAK INC·Filed 1994·Granted Jan 6, 1998·102 cites·22 claims
- 1288US4788645AMethod and apparatus for measuring relative heading changes in a vehicular onboard navigation systemETAK INC·Filed 1986·Granted Nov 29, 1988·68 cites·42 claims
- 1387US6016485ASystem for pathfindingETAK INC·Filed 1998·Granted Jan 18, 2000·153 cites·49 claims
- 1487US5546107AAutomatic chain-based conflation of digital mapsETAK INC·Filed 1994·Granted Aug 13, 1996·130 cites·40 claims
- 1586US4646015AFlux gate sensor with improved sense winding gatingETAK INC·Filed 1984·Granted Feb 24, 1987·42 cites·10 claims
- 1683US4811491ATwo-axis differential capacitance inclinometerETAK INC·Filed 1987·Granted Mar 14, 1989·50 cites·1 claims
- 1781US5694534AApparatus storing a presentation of topological structures and methods of building and searching the representationETAK INC·Filed 1996·Granted Dec 2, 1997·80 cites·20 claims
- 1874US4811613ATwo-axis angular rate gyroscopeETAK INC·Filed 1987·Granted Mar 14, 1989·35 cites·3 claims
- 1974US4686642AMethod and apparatus for generating a stroke on a displayETAK INC·Filed 1984·Granted Aug 11, 1987·23 cites·23 claims
- 2071US5916299AMethod for determining exits and entrances for a region in a networkETAK INC·Filed 1996·Granted Jun 29, 1999·73 cites·57 claims
- 2169US6161092APresenting information using prestored speechETAK INC·Filed 1998·Granted Dec 12, 2000·126 cites·48 claims
- 2251US6026384ACost zonesETAK INC·Filed 1997·Granted Feb 15, 2000·54 cites·30 claims
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