Assignee
DATATRAK INC
US·5 granted patents·441 citations·filing 1986–1989
Top patents by PatentIndex Score
5 records- 0178US4800255AElectronic access card with visual displayDATATRAK INC·Filed 1986·Granted Jan 24, 1989·108 cites·22 claims
- 0275US4967305AElectronic door lock apparatus, system and methodDATATRAK INC·Filed 1989·Granted Oct 30, 1990·112 cites·19 claims
- 0375US4851652AElectronic lock box, access card, system and methodDATATRAK INC·Filed 1988·Granted Jul 25, 1989·96 cites·33 claims
- 0466US4864115AElectronic access card having key pads and coils and combination using the sameDATATRAK INC·Filed 1986·Granted Sep 5, 1989·72 cites·9 claims
- 0558US4808993AElectronic secure entry system, apparatus and methodDATATRAK INC·Filed 1987·Granted Feb 28, 1989·53 cites·17 claims
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