Assignee
DREXLER TECH
98 granted patents·5,298 citations·filing 1977–2002
Top patents by PatentIndex Score
98 records- 0199US4312938AMethod for making a broadband reflective laser recording and data storage medium with absorptive underlayerDREXLER TECH·Filed 1980·Granted Jan 26, 1982·336 cites·15 claims
- 0298US4810868AFrasable optical wallet-size data cardDREXLER TECH·Filed 1987·Granted Mar 7, 1989·103 cites·12 claims
- 0398US4544835AData system containing a high capacity optical contrast laser recordable wallet-size plastic cardDREXLER TECH·Filed 1984·Granted Oct 1, 1985·83 cites·6 claims
- 0498US4360728ABanking card for automatic teller machines and the likeDREXLER TECH·Filed 1981·Granted Nov 23, 1982·85 cites·14 claims
- 0598US4278756AReflective data storage medium made by silver diffusion transferDREXLER TECH·Filed 1979·Granted Jul 14, 1981·83 cites·18 claims
- 0697US4917292ABook on a pocket cardDREXLER TECH·Filed 1988·Granted Apr 17, 1990·89 cites·2 claims
- 0796US4734565ARead-only optical card and systemDREXLER TECH·Filed 1987·Granted Mar 29, 1988·88 cites·24 claims
- 0895US4910725AOptical recording method for data cardsDREXLER TECH·Filed 1986·Granted Mar 20, 1990·77 cites·11 claims
- 0995US4896027APortable detachable data recordDREXLER TECH·Filed 1989·Granted Jan 23, 1990·60 cites·24 claims
- 1095US4314260ALaser pyrographic reflective recording layer in a carbon containing absorptive matrixDREXLER TECH·Filed 1980·Granted Feb 2, 1982·49 cites·36 claims
- 1194US4700840AData card cassetteDREXLER TECH·Filed 1986·Granted Oct 20, 1987·58 cites·13 claims
- 1294US4598393AThree-beam optical servo tracking system with two-track parallel readoutDREXLER TECH·Filed 1984·Granted Jul 1, 1986·56 cites·14 claims
- 1394US4278758AProcess for making a reflective data storage mediumDREXLER TECH·Filed 1979·Granted Jul 14, 1981·44 cites·16 claims
- 1494US4145758AError checking method and apparatus for digital data in optical recording systemsDREXLER TECH·Filed 1977·Granted Mar 20, 1979·66 cites·30 claims
- 1593US4786792ATransmissively read quad density optical data systemDREXLER TECH·Filed 1986·Granted Nov 22, 1988·57 cites·17 claims
- 1693US4634850AQuad density optical data systemDREXLER TECH·Filed 1985·Granted Jan 6, 1987·136 cites·23 claims
- 1793US4385372AReflective optical data storage and laser recording media having grooved dielectric encoded prerecorded informationDREXLER TECH·Filed 1981·Granted May 24, 1983·44 cites·17 claims
- 1892US5457747AAnti-fraud verification system using a data cardDREXLER TECH·Filed 1994·Granted Oct 10, 1995·300 cites·27 claims
- 1992US4884260AData recording system for optical memory tapeDREXLER TECH·Filed 1988·Granted Nov 28, 1989·42 cites·7 claims
- 2092US4284716ABroadband reflective laser recording and data storage medium with absorptive underlayerDREXLER TECH·Filed 1980·Granted Aug 18, 1981·30 cites·8 claims
- 2191US5421619ALaser imaged identification cardDREXLER TECH·Filed 1993·Granted Jun 6, 1995·88 cites·19 claims
- 2291US4863819ARead-only optical data cardDREXLER TECH·Filed 1988·Granted Sep 5, 1989·83 cites·9 claims
- 2390US4692394AMethod of forming a personal information cardDREXLER TECH·Filed 1985·Granted Sep 8, 1987·172 cites·18 claims
- 2490US4269917AData storage medium having reflective particulate silver layerDREXLER TECH·Filed 1980·Granted May 26, 1981·63 cites·17 claims
- 2589US4730293ADual beam optical data systemDREXLER TECH·Filed 1986·Granted Mar 8, 1988·43 cites·22 claims
- 2688US4937810AOptical recording tape with continuous prerecorded tracksDREXLER TECH·Filed 1986·Granted Jun 26, 1990·37 cites·9 claims
- 2788US4837134AOptical memory card with versatile storage mediumDREXLER TECH·Filed 1987·Granted Jun 6, 1989·36 cites·17 claims
- 2888US4642803AOptical data retrieval system for multi-characteristic reflective data storage mediaDREXLER TECH·Filed 1985·Granted Feb 10, 1987·36 cites·10 claims
- 2988US4304848AMethod for photographic replication of information on an optical data storage mediumDREXLER TECH·Filed 1980·Granted Dec 8, 1981·33 cites·16 claims
- 3087US4598196ADebit cardDREXLER TECH·Filed 1984·Granted Jul 1, 1986·45 cites·12 claims
- 3186US5412727AAnti-fraud voter registration and voting system using a data cardDREXLER TECH·Filed 1994·Granted May 2, 1995·206 cites·22 claims
- 3285US5559885ATwo stage read-write method for transaction cardsDREXLER TECH·Filed 1994·Granted Sep 24, 1996·185 cites·16 claims
- 3385US5029125AMethod of reading and writing files on nonerasable storage mediaDREXLER TECH·Filed 1989·Granted Jul 2, 1991·122 cites·9 claims
- 3485US4972397ADithering optical data loggerDREXLER TECH·Filed 1988·Granted Nov 20, 1990·33 cites·23 claims
- 3585US4937963AProtective enclosure for data cardsDREXLER TECH·Filed 1988·Granted Jul 3, 1990·92 cites·23 claims
- 3685US4736966AData card with peelable protective layersDREXLER TECH·Filed 1986·Granted Apr 12, 1988·31 cites·23 claims
- 3785US4711347AProtective envelope for optical data cardDREXLER TECH·Filed 1986·Granted Dec 8, 1987·67 cites·26 claims
- 3885US4542288AMethod for making a laser recordable wallet-size plastic cardDREXLER TECH·Filed 1984·Granted Sep 17, 1985·99 cites·10 claims
- 3985US4298684AReflective data storage medium made by silver diffusion transfer in silver-halide emulsion incorporating nucleiDREXLER TECH·Filed 1980·Granted Nov 3, 1981·28 cites·1 claims
- 4084US5121131AInstant high contrast imaging systemDREXLER TECH·Filed 1989·Granted Jun 9, 1992·24 cites·16 claims
- 4183US6318633B1Method and system for laser writing on smart/optical cards data pixels usable in e-commerce transactionsDREXLER TECH·Filed 1999·Granted Nov 20, 2001·55 cites·34 claims
- 4283US4609812APrerecorded dual strip data storage cardDREXLER TECH·Filed 1985·Granted Sep 2, 1986·141 cites·8 claims
- 4382US4711996ARedundant optical recording of information in different formatsDREXLER TECH·Filed 1985·Granted Dec 8, 1987·137 cites·28 claims
- 4482US4656346ASystem for optically reading and annotating text on a data cardDREXLER TECH·Filed 1985·Granted Apr 7, 1987·27 cites·13 claims
- 4581US4820913AMultiple card recording systemDREXLER TECH·Filed 1986·Granted Apr 11, 1989·23 cites·12 claims
- 4680US4957580AMethod for making an optical data cardDREXLER TECH·Filed 1988·Granted Sep 18, 1990·24 cites·16 claims
- 4780US4343879AMultiple layer optical data storage and recording mediaDREXLER TECH·Filed 1980·Granted Aug 10, 1982·38 cites·8 claims
- 4879US4901241ADebit card postage meterDREXLER TECH·Filed 1988·Granted Feb 13, 1990·108 cites·7 claims
- 4976US4999278ATransmissively read optical recording mediumDREXLER TECH·Filed 1989·Granted Mar 12, 1991·17 cites·34 claims
- 5076US4745484AMethod and apparatus for stepped imaging in reading dataDREXLER TECH·Filed 1986·Granted May 17, 1988·32 cites·11 claims
Showing the top 50 of 98 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when DREXLER TECH files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →