Assignee
PREVIEW SYSTEMS INC
US·6 granted patents·1,861 citations·filing 1997–1998
Top patents by PatentIndex Score
6 records- 0195US6009525AMulti-tier electronic software distributionPREVIEW SYSTEMS INC·Filed 1997·Granted Dec 28, 1999·340 cites·10 claims
- 0290US6009401ARelicensing of electronically purchased softwarePREVIEW SYSTEMS INC·Filed 1998·Granted Dec 28, 1999·557 cites·19 claims
- 0386US6285985B1Advertising-subsidized and advertising-enabled softwarePREVIEW SYSTEMS INC·Filed 1998·Granted Sep 4, 2001·403 cites·14 claims
- 0486US6189097B1Digital CertificatePREVIEW SYSTEMS INC·Filed 1997·Granted Feb 13, 2001·228 cites·36 claims
- 0584US6272636B1Digital product execution control and securityPREVIEW SYSTEMS INC·Filed 1997·Granted Aug 7, 2001·197 cites·17 claims
- 0681US6073256ADigital product execution controlPREVIEW SYSTEMS INC·Filed 1997·Granted Jun 6, 2000·136 cites·25 claims
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