Assignee
NPD RESEARCH INC
US·5 granted patents·1,339 citations·filing 1980–1988
Top patents by PatentIndex Score
5 records- 0195US5023929AAudio frequency based market survey methodNPD RESEARCH INC·Filed 1988·Granted Jun 11, 1991·296 cites·46 claims
- 0295US4603232ARapid market survey collection and dissemination methodNPD RESEARCH INC·Filed 1984·Granted Jul 29, 1986·463 cites·17 claims
- 0393US4355372AMarket survey data collection methodNPD RESEARCH INC·Filed 1980·Granted Oct 19, 1982·410 cites·9 claims
- 0483US4954699ASelf-administered survey questionnaire and methodNPD RESEARCH INC·Filed 1988·Granted Sep 4, 1990·105 cites·15 claims
- 0577US4912466AAudio frequency based data capture tabletNPD RESEARCH INC·Filed 1988·Granted Mar 27, 1990·65 cites·38 claims
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