Inventor · disambiguated record
Johannes H. M. Spruit
Also filed as: SPRUIT JOHANNES H M · SPRUIT JOHANNES HENDRIKUS M
11 granted patents·181 citations·filing 1988–1997
91Inventor score
Technology areasG11B
Files withPHILIPS CORP11
Top patents by PatentIndex Score
11 records- 0196US5153873AOptical record carrier and method and apparatus for increasing the resolution of information recorded thereon and read therefromPHILIPS CORP·Filed 1989·Granted Oct 6, 1992·71 cites·27 claims
- 0282US5802032AMethod and device for recording a mark having a substantially constant number of pulses per unit length independent of writing speed on an optical information carrierPHILIPS CORP·Filed 1997·Granted Sep 1, 1998·31 cites·13 claims
- 0370US5065377AMethod of and apparatus for writing and reading a magneto-optical record carrier with an information density greater than that corresponding to the size of the scanning spotPHILIPS CORP·Filed 1989·Granted Nov 12, 1991·17 cites·26 claims
- 0460US5126985AMethod of recording information on a record carrier of the thermomagnetic type, and device for carrying out the methodPHILIPS CORP·Filed 1991·Granted Jun 30, 1992·13 cites·12 claims
- 0558US5014254AMagneto-optical recording method and magneto-optical recording apparatusPHILIPS CORP·Filed 1988·Granted May 7, 1991·10 cites·13 claims
- 0656US5442597AApparatus for writing and reading a magneto-optical record carrierPHILIPS CORP·Filed 1993·Granted Aug 15, 1995·9 cites·22 claims
- 0750US5371721AMethod and apparatus for writing and reading a magneto-optical record carrierPHILIPS CORP·Filed 1992·Granted Dec 6, 1994·9 cites·28 claims
- 0848US5282095ADirect over-write magneto-optical recording medium having multiple recording layers, and method of recording new information by directly overwriting pre-existing recorded information on such mediumPHILIPS CORP·Filed 1992·Granted Jan 25, 1994·7 cites·8 claims
- 0944US5307328AMagneto-optical scanning device with small coilPHILIPS CORP·Filed 1992·Granted Apr 26, 1994·6 cites·20 claims
- 1040US5553038AMagneto-optical record carrier with recording track structure suited for high density recordingPHILIPS CORP·Filed 1995·Granted Sep 3, 1996·4 cites·10 claims
- 1135US5321682AMethod of and device for recording information on a record carrier having a recording layer which, when heated, undergoes an optically detectable changePHILIPS CORP·Filed 1992·Granted Jun 14, 1994·4 cites·27 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →