Inventor · disambiguated record
Jacobus P. J. Heemskerk
Also filed as: HEEMSKERK JACOBUS P J · HEEMSKERK JACOBUS PETERUS JOSE · HEEMSKERK JACOBUS PETRUS JOSEP
15 granted patents·2 pending applications·706 citations·filing 1979–2004
95Inventor score
Top patents by PatentIndex Score
17 records- 0196US6628584B1Apparatus and associated method for linking information on a read only record carrierKONINKL PHILIPS ELECTRONICS NV·Filed 2000·Granted Sep 30, 2003·78 cites·12 claims
- 0296US5453968AMethods of and information recording devices for recording and/or inhibiting recording of an information signal having copy bits with logic values which alternate in accordance with a patternPHILIPS CORP·Filed 1994·Granted Sep 26, 1995·143 cites·34 claims
- 0395US4325135AOptical record carrier and apparatus for reading itPHILIPS CORP·Filed 1979·Granted Apr 13, 1982·56 cites·41 claims
- 0494US5677903AMulti-layer information storage system with improved aberration correctionPHILIPS CORP·Filed 1994·Granted Oct 14, 1997·56 cites·14 claims
- 0593US4358200AOptical focussing-error detection systemPHILIPS CORP·Filed 1980·Granted Nov 9, 1982·68 cites·15 claims
- 0691US4665310AApparatus for optically scanning an information plane wherein a diffraction grating splits the beam into two sub-beamsPHILIPS CORP·Filed 1985·Granted May 12, 1987·50 cites·3 claims
- 0789US5428598ARecord carrier with copy bitsPHILIPS CORP·Filed 1993·Granted Jun 27, 1995·48 cites·15 claims
- 0886US6031815AInformation carrier containing auxiliary information, reading device and method of manufacturing such an information carrierPHILIPS CORP·Filed 1997·Granted Feb 29, 2000·103 cites·18 claims
- 0984US6310838B1Record carrier and apparatus for scanning the record carrierPHILIPS CORP·Filed 1998·Granted Oct 30, 2001·44 cites·8 claims
- 1079US5841753AMulti-layer information storage system with improved aberration correctionPHILIPS CORP·Filed 1997·Granted Nov 24, 1998·24 cites·3 claims
- 1174US4365323AOptic read unit for scanning a record carrier having a radiation-reflecting information structurePHILIPS CORP·Filed 1980·Granted Dec 21, 1982·21 cites·22 claims
- 1272US6577574B1Method of registering a running time on an information carrier, information carrier and apparatusKONINKL PHILIPS ELECTRONICS NV·Filed 2000·Granted Jun 10, 2003·8 cites·24 claims
- 1351US4354103AOptical focusing device with two controlsPHILIPS CORP·Filed 1980·Granted Oct 12, 1982·7 cites·4 claims
- 1445US7075876B2Method of registering a running time on an information carrier, information carrier and apparatusKONINKL PHILIPS ELECTRONICS NV·Filed 2004·Granted Jul 11, 2006·0 cites·2 claims
- 1543US6778484B2Method of registering a running time on an information carrier, information carrier and apparatusKONINKL PHILIPS ELECTRONICS NV·Filed 2003·Granted Aug 17, 2004·0 cites·21 claims
- 1640US2006204751A1Content information layer for an optical record carrierKONINKL PHILIPS ELECTRONICS NV·Filed 2004·Application pending·0 cites
- 1737US2002078181A1Apparatus and method for reading data from a data carrier and data carrier for use in the apparatus and methodKONINKL PHILIPS ELECTRONICS NV·Filed 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Jacobus P. J. Heemskerk files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →